Heavy-duty Prusik-Minding Pulley (PMP) Weight: 280g (9.9oz.)|Strength: MBS: 50kN (12240lbf)|Aluminum body with Stainless Steel sheave|For use with single ropes up to 13mm (1/2")|Roller bearings are ideal for low loads at high speeds|Tamper-proof rivets|Certifications: CE EN12278, NFPA 1983