KnitPro Interchangeable Needle Cable Knitpro Sale! from 250 /per Size 40cm 50cm 60cm 80cm 100cm 120cm 150cm Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Interchangeable Circular Cables to work with Knit Pro interchangeable knitting needle tips. 40, 50, 60, 80, 100, 120, 150cm Each cable comes with a securing key and two screw on ends caps.