For ball screw precision tolerance, now have C10, C7, C5, C3, C2, C1. The smaller the number, the higher the accuracy. The most widely use ball screw now is C7 and C5. Our C7 ball screw is rolled thread ball screw, which the accuracy is C7=0.05mm in 300mm
This is a pair of slip-on Fitkids school shoes which characterizes to easy put on and off. There is a black elastic band connect the shoe tongue and collar, allowing more flexibility when wearing.