AT ONCE DELIVERY - PREWOUND ROTARY SLATFIX REFILL BOBBIN COTTONIZED POLYESTER SIZES: 15 NEEDLE SIZE: MACHINE: 70/10, 80/12 MICROTEX, 75/11, 90/14 QUILTING, 80/12, 90/14 TOPSTITCH, LONGARM - 16. HAND: #10 OR #11 SHARPS.