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 70D2 thickness for strength and durability Crafted from 100 polyester for exceptional durability and color retention