Features 18PCS IN 1 SET: Including 18pcs metal gears, with different numbers of teeth and sizes, with strong practicability. EXCELLENT MATERIAL: Made of excellent HT250 gray iron material, with rustproof surface, wear and corrosion resistant. MULTIPLE TYPES: Equipped with 2pcs duplex gears and a moter belt pulley to meet more processing needs. FINE PROCESSING: These gears using fine milling techniques to polish to ensure high accuracy and stability. LATHE ACCESSORIES: Widely used for CJ0618 mini lathe or metal cutting machine, with strong compatibility. Specification: Item Type: Gear Kit Material: HT250 Gray Iron Specification: TypeDiameterThicknessToothT80 Gear83mm / 3.3in7mm / 0.3in80 ToothT60 Gear62mm / 2.4in7mm / 0.3in60 ToothT50 Gear52mm / 2in7mm / 0.3in50 ToothT45 Gear48mm / 1.9in7mm / 0.3in45 ToothT40 Gear42mm / 1.7in7mm / 0.3in40 ToothT35 Gear37mm / 1.5in7mm / 0.3in35 ToothT30 Gear32mm / 1.3in7mm / 0.3in30 ToothT25 Gear26mm / 1in7mm / 0.3in25 ToothT20 Gear20mm / 0.8in7mm / 0.3in20 ToothDuplex Gear68mm / 2.7in, 50mm / 2in45mm / 1.8in43 Tooth, 31 ToothDuplex Gear50mm / 2in, 30mm / 1.2in24mm / 0.9in30 Tooth, 18 ToothBelt Pulley29mm / 1.1in20mm / 0.8in Package List:2 x T80 Gear2 x T60 Gear2 x T50 Gear2 x T45 Gear2 x T40 Gear2 x T30 Gear1 x T35 Gear1 x T25 Gear1 x T20 Gear2 x Duplex Gear1 x Moter Belt Pulley Package List 2 x T80 Gear 2 x T60 Gear 2 x T50 Gear 2 x T45 Gear 2 x T40 Gear 2 x T30 Gear 1 x T35 Gear 1 x T25 Gear 1 x T20 Gear 2 x Duplex Gear 1 x Moter Belt Pulley