Features Plastic Gears, Plastic Gear Set 26pcs Plastic Shaft Worm Gear Sleeve 2mm/2.3mm/3mm/3.17mm/4mm for Aircraft Car Model Description: If you are an amateur model, you know that shaft gears are essential and necessary parts for models. Aircraft, automobiles, boats, robots and other small science and technology productions will need to use axle gears. Here we provide 26pcs shaft gears of different sizes and sleeves which can meet your basic needs for model making. They are also good old or broken gear replacement parts. Specifications: Material: plastic Module: 0.5 Shaft Gears: White: 80.8A, 81A, 81.5A, 82A, 102A, 122A, 132A, 142A, 182A (9pcs) Blue: 153AD, 152.3A, 15.317A, 154AD (4pcs) Worm Gears: 6*62A, 6*82A (2pcs) Bevel Gear: S162A (1pc) Shaft sleeves:2mm(10pcs) Weight: 4g(approx) Gear Diameter = (Number of Teeth + 2) x 0.5 e.g. 81.5A 8 represent 8 teeth, gear diameter = (8+2) x 0.5 = 5mm 1.5A represents a slim fit with 1.5mm shaft. for example 153AD 15 represents 15 teeth, gear diameter = (15+2) x 0.5 = 8.5mm 3AD represents a slim fit with 3mm D shaft. Package Including 9pcs x White Shaft Gears 4pcs x Blue Shaft Gears 2pcs x Worms 1pc x Bevel Gear 10PCS x Pipe Sleeves Note: Monitors are not calibrated same, item color displayed in photos may be slightly different from the actual object. Please consider the real one as standard Package List