2 1/4" Hospitality Bed Wide Soft-Tread All Surface Limited Slip Bed Frame Caster Load Capacity of 125 Pounds for Each Caster Black Rubberized Soft-Tread Wheel 2 1/4 Inches Wide x 2 Inches High Caster Color is Yellow Zinc, Stem is 3/8 Inches x 1 9/16 Inches Plastic Plug Inserts Included LIFETIME SERVICE POLICY