"This Northern Industrial Tools 18in. x 30in. mover's dolly is made of 3/4in. thick hardwood for durability. Base L x W in. 18 x 30, Caster Material Hard rubber, Caster Size in. 3, Caster Type Swivel, Material Type Hardwood, Deck Construction Open, Includes 6 in. Wide head board, Load Capacity lbs. 1,000. Carpeted end rails protect cargo from scratches and abrasions Countersunk bolts will not mar cargo Hard rubber nonmarking 3in. casters Casters swivel for easy maneuverability Solid hardwood frame features open deck construction 1,000-lb. capacity"