... surface of insulate plates are painted by insulate paint.4)Hook assembled.5)safety factor is more than 3 times.6 ... and hooksRated load(KN)Weight(kg)JH5-1B1wheel,hook,close side50.85JH5-1K1 wheel,hook,open side50.90JH5-2D2 wheels,short leg ... -4D4wheels,short leg hook202.6JH20-4C4wheels,long leg hook202.8The hook are different from the leg length, one type is short ...