SKU: 32733507036

Didactic Four Stroke-cycle Engine Demonstrator Finger Engine

Sale price$107.09 Regular price$118.99
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Didactic Four Stroke-cycle Engine Demonstrator Finger EngineDidactic Four Stroke cycle Engine Demonstrator Finger Engine Features:. Tribute to the classic: Tribute to the first four stroke internal combustion engine in history, this internal combustion engine model adopts a single cylinder four stroke 2 valve double cam ejector structure, with a simple structure, light and exquisite, and is a mini handcraft that you can't put it down.. Sophisticated craftsmanship: All metal refined, highly textured metal

Didactic Four Stroke-cycle Engine Demonstrator Finger Engine


Features:


.Tribute to the classic: Tribute to the first four-stroke internal combustion engine in history, this internal combustion engine model adopts a single-cylinder four-stroke 2-valve double-cam ejector structure, with a simple structure, light and exquisite, and is a mini-handcraft that you can't put it down.
.Sophisticated craftsmanship: All-metal refined, highly textured metal parts, strong and impressive mechanical sense, can bring you knowledge about the wonderful world of physical and mechanical engineering in the process of playing.
.Simulation operation: It is not only a decoration model, but also a simulation dynamic model that can simulate the operation of a real engine. Running the flywheel by hand, the piston is movable, the timing of the intake/exhaust valve corresponds, the working process of the engine is visualized, and the working principle is clear at a glance.
.Science and education Assembly: It truly restores the working principle of the OHV engine and can be used for teaching demonstrations. At the same time, it is also a decompression handheld toy for mechanical enthusiasts, and it is also a good physical and mechanical educational toy for children.
.This model has been assembled, do not disassemble at will. Do not play with violence to avoid damage to the model. Please keep it properly after use, and pay attention to cleaning and maintenance for longer use.

Specifications:

.Material: Metal
.Piston Diameter: 14mm
.Stroke: 11mm
.Flywheel Diameter: 24mm
.Product Dimensions: 5 x 5 x 7.5cm
.Product Weight: 75g
.Package Dimensions: 10 x 10 x 7.5cm
.Package Weight: 200g
.Packing: Box
.Age 8+

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 32733507036

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 323 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Amazon Customer
Charlottesville, US
★★★★★ 3
Leaks into the bag!!!!!
Haven’t even tried it yet and just received it just a few minutes ago…. This is ridiculous
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 24, 2025
J
Verified Purchase
Jennifer Donnelly
Carnegie, US
★★★★★ 5
Pleasantly surprised
I’m two jars in and love it. I do use Botox, retinol, a good face wash, wash moisturize twice daily, etc etc. I struggle with moisturizer because I’m prone to breakouts. Idk what it is about this one but my skin loves it. It feels refreshed and soft. Added bonus, my eyebrows and lashes have gotten longer and darker quick! Obviously we all respond differently to products but I’ll be keeping this in my rotation
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
D
Verified Purchase
Deb from the Ridge
Alexandria, US
★★★★★ 5
A thick and rich cream that smooths on nicely!
So I jumped on the Korean skincare bandwagon and decided to purchase some of the DR MELAXIN Products to try! I read many good reviews and decided it was worth the money. This first product is the Dr Melaxin Calcium cemenrete calcium volume cream. It comes in a 1.76 ounce glass jar. On the label there is a lot of word descriptions so I will add a few: Ex volume firming, rebornic 10,000 ppm hydrolyzed elastin and collagen extract. I have photographed label for viewing. The directions indicate to "apply a small amount of cream onto your face especially around the under-eye area". I found the cream thick and rich and I used it in addition to another Dr Melaxin neck and face product so I concentrated on only neck and under eye area. It is neutral in scent and is very thick so it feels like it is absorbing nicely. I have been using it for about a month now and have definitely noticed some improvement in the neck area so i will continue to use and layer with other products. I do recommend this line as the ingredients seem effective so far!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
E
Verified Purchase
E.R.
Draper, US
★★★★★ 5
Good product for face.
Great product. Works well with decreasing lines in face after half is used and with the serum. It does leave somewhat of a sticky (not grimy) texture which is uncomfortable if using at night.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
E
Verified Purchase
E. L. Phipps
Carnegie, US
★★★★★ 4
Loose under eye skin tightened and brightened!
I love this cream! It makes a huge difference in the strength of the skin under my eyes and smooths the look and feel of the wrinkled skin under my eyes. It brightens my under eye circles. I gave 4 stars because if you use too much it will start to roll off almost like skin does when it sheds or when you exfoliate. I use less now and it’s perfect.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026

recommand products