3.75 Plain/Terry MachineNew Car, 330-350 RPM Heel 200-250 RPM 4.5 inches plain/terryNew Car, 100-120 RPM Heel 100 RPM All-computer machine adopts all-computer control system, high stability. The touch screen operation is simple and convenient, and the maintenance cost is low. Knitting socks part operation simple and easy to understand, easy to use for workers at any time. High production capacity and good quality. Plain socks 170 pairs/10 hours. and for terry 140 pairs/10 hours.