Refill cartridge for SCHMETZ display 36,5x18 cm Twin SCHMETZ needle for decorative stitch, application - for stretch and knitted fabrics. 30 sets. Distance 4,0 mm, 2x75. ZWI needles are designed for household sewing machines which sew zigzag, with crossed hook mounted. IT'S WORTH KNOWING... In order to easier identify of needles for household machines, SCHMETZ applies the coloured marks on the shank cone: UNIVERSAL (STANDARD) - without marks BALL POINT (WITH BALL) - for jersey and knitted fabric