12 Pack Swivel Stem Caster w/ 2" Hard Rubber Wheel 3/8" threaded stem 1.1" Stem Length Heavy Duty Rotate 360 degrees. Smooth & Silent & Sturdy. HEAVY DUTY Capacity: 100lbs each. 3/8" (9.2 mm) threaded stem. 1.1" (30mm) threaded stem length Wheel Dia.: 2" (51mm). Wheel Width: 0.4" (20mm). Wheel Material: Rubber Overall Height: 2.5" (63mm). Color: Black Includes: 12 (2" Stem Caster)