10 mm Lead Ring

Harken Lead Rings are simple, weight-saving devices used to route line for jib in-haulers, twings, barberhaulers, Lazy Jacks, cascading backstays and other applications requiring minimal fine-tune adjustments. Rings are Hard Lube-anodized 6061-T6 aluminum for a smooth, slippery surface. With no moving parts, wear is minimal. 

Specifications 
Center hole Ø: 10mm - 7/16in 
Outer groove width: 6mm - 1/4in 
Weight: 4.4g - .155oz