CMI Stainless Steel Arborist Rigging Block (3/4″ Rope) – RP131

These stainless steel blocks are the latest in a long list of great pulley designs by CMI. Engineered to take on the most demanding rigging jobs, the block cheeks are made from high-strength stainless steel to give you years of service. Aluminum alloy bushings and sheaves are supported by zinc plated steel axles. Upper bushing is easily accessed by a no-slip nob, and it is captive, so you won’t loose it. Sheave is 4″ in diameter and is supported by a sintered bronze bushing.


Cheek plates are broad enough to protect lines during use and polished to a shine. Blocks have a manufacturer work load limit (WLL) of 6,000 lbs at 7:1 ratio and weigh approximately 5.6 lbs (2.5kg).