HARKEN 51mm Single High-Strength Block, 308 Small Blocks_Micro CB (Captive Ball) high-beam variable

CB (Captive Ball) high-beam variable hole spacing track is used to span cockpits or other unsupported areas

or pivot so lines have a fair lead under load

RF1034 - 5/16" shackle pin dia

with sheaves that are only 5/8" in diameter

HARKEN 51mm Single High-Strength Block, 308 Small Blocks_Micro CB (Captive Ball) high-beam variableHarken 51mm Single High Strength Block to carry wire halyards and high strength control lines. Harken's Lightweight, low friction blocks with high load composite bearings carry wire halyards and control line cascades. Side load balls reduce friction from twists or unfair leads on 304 311. 300 303 has thrust washers. Blocks open to allow passage of swaged wire. Hard Lube anodized sheave for strength and corrosion resistance. Cheek blocks include