? Stainless Steel Blocks from CMI come with a 2-3/4" sheave and stainless steel bolt to maximize sling strength while the wide sideplates protect the rope from contact with rough bark.
? The upper bushings have a knurled knob and are captive so they can?t get lost. Stainless steel and aluminum for durability in outdoor conditions.
? The RP131 handles rope up to 3/4", working load limit of 8,000 lbs., weighs 5.6 lbs.