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Description
Mini V4 Brass Steam Engine Model Reverse Gearbox (without Boiler)Mini V4 Steam Engine Model with Reverse Gearbox (without Boiler) Features: . Exquisite Appearance: The model of the steam engine is small and novel. It can be placed in the palm of your hand like a treasure. It is exquisite and mini. . Steam Engine Structure: Piston slide valve. . Reversing Structure: Forward and reverse two gears, automobile hand wave structure, often meshing fork gear. Miniature stainless steel crankshaft, with bearings at both
Mini V4-Steam Engine Model with Reverse Gearbox (without Boiler)Features:
.Exquisite Appearance: The model of the steam engine is small and novel. It can be placed in the palm of your hand like a treasure. It is exquisite and mini.
.Steam Engine Structure: Piston slide valve.
.Reversing Structure: Forward and reverse two gears, automobile hand wave structure, often meshing fork gear. Miniature stainless steel crankshaft, with bearings at both ends, gearbox gears also fixed with bearings, brass gear transmission, shift fork clutch
.Instructions for Use: This steam engine model is small in size, low in power consumption, and high in thermal / dynamic conversion efficiency. It is an efficient power option in the case of small model space and low boiler (50 * 100mm diameter) power.
.Please connect the boiler by yourself (boiler is not included), add steam cylinder oil to lubricate all parts, connect φ4mm copper pipe, pressure between 2-4, open the steam valve
.Simple and Convenient Maintenance: Fully consider the player's use and maintenance issues, designed as a detachable structure, easy maintenance and replacement of parts
.Significance and Value: By operating the steam engine model, you can learn the operating principle of steam more intuitively. At the same time, this model is a collectible with collectible meaning. Can also be used for steam ship models, car models, small generators, etc.
.For Age: 14 years and older
Specifications:
.Color: As Shown
.Material: Metal
.Weight: 320g
.Dimensions: 115 x 95 x 80mm
.Cylinders: 4 Cylinders
.Bore x Stroke: 8mm x 8mm
.Valve Gears: Walschaerts
.Pressure: 3kg/cm²
.Temperature:50~120℃
.Lubricator: Screw-cap-type
.Axle: φ3mm
.Gearratio: 1:1(36:36)
.Base Fixing Hole: Ø315 x 25mm
.Product Dimensions: 12 x 8.5 x 10cm
.Product Weight: 320g
.Package Dimensions: 15 x 12 x 12cm
.Package Weight: 400g
.Packing: Box
Package Content:
.1Set x Mini V4-Steam Engine
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.7 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Great bra!
Color: Dark Beige, Size: 38D
I have several different bras from this brand. This is a really good minimizer. It has a nice wide strap. I don’t love the clasp as it is covered in a hard material, but overall it is a good bra that you can wear all day under form fitting shirts.
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Reviewed in the United States on May 11, 2026
★★★★★ 1
Uncomfortable
Color: Light Beige, Size: 38DD
In my search for a comfortable well-fitting bra, I came across this one. Reviews were good, so I ordered one. Half way through the day, I had to take it off. This is the most uncomfortable bra ever. This one went on to the "uncomfortable pile" pretty quick
Not full coverage and not supportive. Side coverage is pretty good but straps are thin and do not lift.
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Reviewed in the United States on March 25, 2026
★★★★★ 5
Best Bra for Top Heavy Girlies!
Color: Light Beige, Size: 40C
I tried HSIA in the past but non of the bras fit right but this bra is the best! I’m glad I gave HSIA another chance because this is the best bra I’ve ever had! I’m already top heavy and doesn’t add extra bulk. It’s comfortable and breathable. In top of all that it’s affordable!
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Reviewed in the United States on April 25, 2026
★★★★★ 3
Much smaller cups
Color: Light Beige, Size: 36I
This has much smaller cups than indicated
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Reviewed in the United States on April 15, 2026
★★★★★ 5
Good Price, Great Bra
Color: Dark Pink, Size: 44G
These bras are outstanding! Both the band and cup size fit are exactly as they should. Having bottom heavy breast means I always have to have a underwire. Lace material with underwire can be tricky for us with larger bra sizes, as the underwire can be uncomfortable and the lace tends to be hard and scratchy on the skin. A beautiful garment can become uncomfortable and tear easily, if not made well. That has not been my experience with these bras at all. I have purchased them several times. The material is nice and softens after it has been washed. They maintain shape and hold well. For this quality and delicacy, I would normally pay upwards of $60 per bra. With these, I get great price, quality material and excellent comfort, style and fit.
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Reviewed in the United States on May 31, 2026