C&F Design Standard Bobbin (Regular Size)
-Optimized bobbin weight (17g) helps keep tension on material during tying.
-Teflon-coated bobbin arms for smooth spool revolution.
-Clever Micro Slit Foam design in bobbin nose to retain constant thread tension.
-Bobbin tube made of zirconium ceramic to reduce thread breakage.
-Comes with a spare threader.