Uxcell 10mm Threaded Stem 50mm Dia Plastic Wheel Chair Caster, Black Product Name : threaded stem caster wheel;Type : 360 degree rotationdouble wheels Wheel size : 50 x 10mm/2"x 0.96"(D*t);total size (approx.) : 70 x 50 x 80mm/2.8"X 2 inch x 3"(l*w*h) Threaded Dia. : 10mm/0.39";thread part length : 1.2cm/0.5" Material : plastic, metal;Color : black, gray Weight : 99G;Package Content : 1 x threaded stem caster wheel