1. 3.75 inches 2. Double shovel-needle improves the efficiency 3. 300-350 pairs /day, 4. 72-240 needles, 6 needle selection Specification Needle CylinderMain ProductNo. of NeedlesNeedle SelectionSpecification 3.75 inch Plain and Terry Sock machineBesides the ordinary products,the machinecan also make socks likerabbit hair, sheep woolen, etc. Terry:72-168NPlain:72-240N6 Needle selection Choice of ...