Standard Features: • Meets all pertinent world standards. • Hardened steel rollers supporting the load sheaves run smoother and last longer than bearings • Spur gear efficiency reduces operator effort. Double pawl and double guide rollers enhance performance,Website:http://www.chinachain-hoist.com, safety and reliability. • Load chain is alloy steel grade 80 according to ISO 3077 • Deformation indicators - Two strategically placed marks allows for measurement to determine if the throat opening has changed thus indicating abuse or overload • Equipped with wide throat top and bottom drop forged hooks that are designed to bend slowly to warn of overloads • Every chain block is operationally tested to 150% of the rated capacity and issued an individual test certificate with unique serial number •  New design Japanese Hooks with cast safety latches • Safety factor: 4 times of the rated capacity Optional Features: • Overload protection system • Caged roller bearings on load sprocket • Zinc plated load chain • Thrust bearings in bottom hook assemblyModelSLH-E型手拉葫芦Rated 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/kg210/21.4330/33.7370/38215/22390/40450/46450/46450x2/46x2No.of Falls11112248Load ChainMM5x156.3x198x2410X308x2410x3010x3010x30Hand Chainmm5x23.7x18Amm110131147168146168168200Bmm133156196230196230390640DimensionsCmm3003404106005106908201040Dmm26303438424885110Kmm2227313439456581Net Weightkg7.5121827.52549.598210Gross Weightkg7.812.51928.52650.5106.5225Extra Wt. per mkg1.51.812.32.213.75.39.719.4