Contains a set of (4) 3SBR-15ST-LDP-TLB Threaded Stem Caster Kit in POP Box, (4) 3" diameter, 1/2" x 3/4" threaded stem, polyolefin wheel with brake, 220 lb capacity, resistant to oil and grease, double ball bearing, operational temp range -45° to 180°F, zinc plated