Rockwell case hardened 56-58 steel
Sealed ball bearings
Excellent for challenging outdoor environments
Built for to ⅜, ½, ⅝, ¾,” diameter cable
NFPA 1983-2012 Section 7.6.5.4 Pulley Performance Requirements- General Use
Minimum 3 sigma breaking strength (3σ MBS) of not less than 36 kN (8,093 lbs)
Independent test rated to 19,000 Lbs.
Tested to NFPA 1938-2012 Class G, exceeds ANSI and OSHA standards