Uxcell a13112000ux0308 Stem Caster Wheels 2 inch Dia Black Plastic Dual Wheels Rotating Wheelchair Stem Caster 2 Pcs Product Name : stem caster wheel;Type : 360 degree rotation Each wheel size : 50 x 15mm/2&#39;&#39; x 0.47"(D*t);total size (approx.) : 83 x 70 x 52mm/2.4&#39;&#39; x 1.8"(D*h) Lock stem size. : 11 x 22mm/0.43" x 0.87"(D*l);material : plastic, metal Color : black, Silver tone;weight : 168G Package Content : 2 x stem caster wheels