chain hoist size: 1T - 20TCapacity, lifting height:3M,6M,9M,12M Hand chain and load chains :G80 chain with 20Mn2 material OEM design is acceptable Gear: they innovated symmetrical arrayed high speed synchronous gear and made from international standard steel. more strong and steadier. Chain: adopt high strong chain and high precision welding technology, meet ISO international standard. Fit for heavy and overload working conditions, take your hands a better feeling, Hook: made of high-class alloy steel, it has high strength and high security, by using new design, weight will never escape disconnect.. Limit Switch: using limit switch component in designation to protect chain and ensure security Components: main components are all made of high class alloy steel, with high precision and security Frame work: slight design and more beautiful with less weight and smaller work area Plastic Plating: adopt advanced plastic plating technology inside and outside, it looks like a new one after years of operation Housing: made of high-classed steel, more firmly and dexterous.