Wheels of a series 31 are made of high-quality white polyamide and are intended for movement of freight weighing from 600 to 1500 kg. Used in the food industry: freezers, sausage frames, aggressive environments, also for the ;economical; (due to the solidity of the wheel) transportation of heavy loads in the engineering and construction industries. The temperature of use is -30+80 ° C, for a short time up to +120°С. Ball bearings on the wheel axle provide ease of movement and stability of loaded equipment. Of the obvious minuses, noise is when transporting unloaded equipment. The wheel is resistant to shock and abrasion. The bracket is galvanized for a long service life.