yes, these cost more than the standard pulley's most climber carry. But if you ever really need to haul a someone and don't have ascenders with you....these work better than the alternative.
CMI's Prusik Minding Pulley's are lightweight versions of classic designs. They allow a hauling system to be set up using a prusik to capture rope progress. The aluminum sheave is 1-1/4" in diameter with bushing mechanics. Made with aluminum sideplates and an aluminum axle.
Weight: Single 91 grams
Strength: 31kN 7,000 lbs
Rope: Max Ø 13mm