OTTO Embroidery Pre-Wound Bobbin Thread - White Bobbins 1 Colors Available View Our Thread Color CardView Our Thread Conversion Chart OTTO Embroidery Pre-Wound Bobbin Thread, Perfect for Effortless Embroidery! Reduce Breakage, Knots & Jams!. Pre-Wound White Bobbin Thread for hassle-free embroidery setup; Saves time and effort by eliminating the need for manual winding; Designed to fit L-Type bobbin cases for hassle-free usage; 134 yards per bobbin for small to medium-sized embroidery projects; 144 pcs per box (not sold separately) ensures ample supply for ongoing projects; Paper-Sided design facilitates easy insertion and removal from bobbin case; Continuous polyester filament thread with a 70D/2 thickness for strength and durability; Crafted from 100% polyester for exceptional durability and color retention