Rollers in a flat-tape drawing line must be specified for their exact machine position and contact with the tape. Their body diameter, working width, shaft ends, mounting and surface requirement may differ between line positions. For a replacement, provide the line model, a drawing or measured dimensions, photos of both ends and the duty of the original roller. The roller shown on Kangjia’s product page is a construction example, not a universal part for every drawing line. Material, finish, tolerances and delivery scope are confirmed against the actual drawing and project quotation.