Harken 29mm Stand-up Block

Murrays Part# 56-31297

Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming. 

Specifications:

• 330 lb. SWL
• 1000 lb. breaking strength
• 5/16" maximum line diameter
• 1-1/8" sheave diameter
• 2-3/16" long

Harken Part #349

Nacra Part# 31297