Description: If you are a model amateur, you would know that gears, pulleys and worms are essential and necessary parts for models. Aircraft, automobiles, boats, robots and other small production of science and technology will all need to use those parts. Here we provide many gears of different sizes and many other accessories which may meet your basic needs for model making. They are also good replacement of old or broken parts. Features: Made of high quality plastic, wearable and long service life. These products are for toys gear pulley and other spare parts, suitable for DIY model technology production. There are six different set for your option including many kinds of gear parts and you can find one that better meet your need. Small parts, easy to use, great model making accessories for all kinds of cars, robots, etc. They are also good replacement of old or broken parts.Specifications: Main Material: Plastic 34kinds: Aperture Diameter(mm)Outside Diameter(mm)Pitch Diameter(mm)Thickness(mm)8Teeth1.9544.810Teeth1.965610Teeth1.9659.0710Teeth2.465516Teeth1.998520Teeth1.911101.5Double Layer20/101.911/610/51.5/3.5Double Layer20/102.011/610/51.5/3.524Teeth1.913121.530Teeth1.916151.530Teeth2.416151.5Double Layer 30/10216/615/51.5+3.532Teeth1.917161.532Teeth2.917162.5Double Layer 32/101.917/616/51.5+3.85Double Layer 32/102.017/616/51.5+3.85Double Layer 32/20217/1116/101.5+3.9336 Teeth Eccentric Gear1.918201.5Double Layer 46/10223/623/51.448 Teeth1.925241.548 Teeth2.425241.556 Teeth1.929281.5Single Layer 80 Teeth1.941401.8Single Layer 120 Teeth1.961601.8Sector Gear 28 Teeth1.929281.8Rack 83 TeethInner diameter 2.05-2.55mm, length 125mm, width 4mm, thickness 7mmCrown Gear 83 Teeth1.9Crown gear outer circle diameter 12.652.9+3.85Worm1.9Diameter 5.9, height 9Worm1.9Diameter 5.9, height 6.75Pulley1.9Slot inner diameter 4Outer diameter 5.4Slot width 2Pulley1.9Slot inner diameter 5Outer diameter 9Slot width 2Pulley1.9Inner diameter 13Outer diameter 16Slot width 2Pulley1.9Inner diameter 12.5Outer diameter 18Slot width 2Pulley1.9Inner diameter 21Outer diameter 24Slot width 2T ConnectorThrough hole inner diameter 2.0mm, blind hole inner diameter 1.9mm5 BeltsFolded length: 60mm, 60mm, 40mm, 25mm, 20mm60kinds: Single Layer Gear: 8 kinds, maximum model: 482A Spindle Gear: 10 kinds, maximum model: 182A Double Layer Gear: 12 kinds, maximum model: 46082A Belt Pulley: 7 kinds, maximum model: 242A Crown Gear: 9 kinds, maximum model: C323A Blue Motor Gear: 2 kinds Belt: 4 kinds Shaft Sleeve: 3 kinds Worm: 2 kinds Rack: 1 kind Copper Gear: 1 kind Bevel Gear: 1 kind 64kinds: Spindle Straight Gear: 10 kinds 80.8A 81A 81.5A 82A 92A 102A 122A 132A 142A 182ACrown Gear: 11kinds C152A C203A C282A C282.5A C303A C322A C20082A C28082B C28102.5B C30102B C40102BSingle Layer Gear: 12 kinds 202A 242A 242A 302A 303A 302.5A 322A 362A 402A 422A 482A 562ADouble Layer Gear: 19 kinds16102B 18102A 20082B 20102B 22082A 22102B 24102B 24122B 26082B 28102B 30162A 32082B 34102B 38082B 40102B 46082A 48102B 50102A Pulley: 8 kinds 122B 102B 62A 92A 132A 16.82A 242ABWorm: 2 kindsW6*62A W6*82A T Connector Sleeve: 3T-2A-2B Bevel Gear: S162A 75kinds: Spindle Straight Gear: 9 kinds 80.8A 81A 81.5A 82A 102A 122A 132A 142A 182ACrown Gear: 11 kindsC152A C203A C282A C282.5A C303A C322A C20082A C28082B C28102.5B C30102B C40102BSingle Layer Gear: 12 kinds 202A 242A 282A 302A 303A 302.5A 322A 362A 402A 422A 482A 562ADouble Layer Gear: 19 kinds16102B 18102A 20082B 20102B 22082A 22102B 24102B 24122B 26082B 28102B 30162A 30122B 32082B 34102B 38082B 40102B 46082A 48102B 50102A Pulley: 7 kinds 122B 102B 62A 132A 16.82A 242ABWorm: 2 kindsW6*62A W6*82A T Connector Sleeve: 3T-2A-2B Bevel Gear: S162AMotor Sleeve: 2A2PCS 2.5A2PCS 3A2PCS Elastic: 5pcs(mixed color and size)Rack: 2pcs 80kinds: Single Layer Gear: 10 kinds, maximum model: 482A Spindle Gear: 10 kinds, maximum model: 142A Double Layer Gear: 14 kinds, maximum model: 46082A Belt Pulley: 7 kinds, maximum model: 242A Crown Gear: 10 kinds, maximum model: C323A Blue Motor Gear: 9 kinds Belt: 10 kinds Shaft Sleeve: 4 kinds Worm: 2 kinds Rack: 1 kind Copper Gear: 2 kinds Bevel Gear: 1 kind 85kinds: Sector Gear(4 kinds): 28 teeth, 21 teeth, 15 teeth, 12 teethWorm(3 kinds): 6-6, 6-7, 6-8Blue Spindle Gear(4 kinds): D-shape 3mm, 4mm, round 2.3mm, 3.17mmLarge Pink Pulley: 363A2AB Clutch Gear(2 kinds): 163A, 263B Connector(4kinds): 1 white connector and 3 T connectors(blue, green, yellow)Long Spindle Gear: 102AOthers: Brass gear(1 kind), bevel gear(1 kind), rack(1 kind), sleeves(3 kinds), belts, double layer gear(19kinds) spindle gear(8 kinds), pulley(4 kinds), single layer gear(15kinds), crown gears(14 kinds) Package Includes: 1 Set x Gear Pulley Kits Note:Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. .