Just the thing for hauling on walls or guiding, these CMI micro pulleys have a multitude of uses in a vertical world. Featuring 13 mm rope capacities and 7075-T6 anodized aluminum sideplates for unparalleled strength, these pulleys have a place in every climber or rescuers pack. The aluminum sheave is 1-1/4" in diameter and held in place by a bronze bushing. / Weight Climbers: 50 grams / Weight Rescue: 61 grams / Weight Double: 120 grams / Minimum Breaking Strength: 7,000 lbs (31kN)