1.Meets all pertinent world standards2.Hardened steel rollers supporting the load sheaves run smoother and last longer than bearings3.Spur gear efficiency reduces operator effort. Double pawl and double guide rollers enhance performance,Website:http://www.chinachain-hoist.com, safety and reliability.4.Load chain is alloy steel grade 80 according to ISO 30775.Drop forged hooks that are designed to bend slowly to warn of overloads6.Every chain block is operationally tested to 150% of the rated capacity and issued an individual test certificate with unique serial number.7.Safety factor: 4 times of the rated capacityOptional Features:Overload ProtectionCaged roller bearings on load sprocketZinc plated load chainThrust bearings in bottom hook assemblyModelChain Block SLH-DRated Capacityt0.511.52351020Standard Liftm33333333Proof Loadkn/t7.35/0.7514.70/1.522.05/2.2529.4/344.1/4.573.5/7.5147/15294/30Pull to Rated Loadn/kg240/24.5250/25.5265/27335/34390/40380/39380/39380X2/39X2No.of Falls11111248Load ChainMM5X156X187.1X218X2410X3010X3010X3010X30Hand Chainmm5X23.7X18Amm132151173175173189189230Bmm148172196210230280463655DimensionsCmm3453764424705656908301150Dmm36414242566285110Kmm2834393947516581Net Weightkg9.312.216.519.5284381205Gross Weightkg9.812.71720.529.544.593219Extra Wt. per mkg1.51.71.971.973.35.39.719.5