uxcell Office Chair 2 Inch Dia Wheel Square Plate Mount Swivel Caster 8 Pcs Main Material: Plastic, Metal; Package Content: 8 Pcs x Caster Wheel; Product Name: Caster Wheel Weight: 597g; Main Color: Black, Silver Tone; Overall Size: 70 x 45 x 65 mm/2.8" x 1.77" x 2.56"(L*W*H) Wheel Size: 50 x 12 mm/2" x 0.47"(D*T); Mounting Hole Center Distance: 26 x 26 mm/1" x 1"(L*W); Mounting Hole Dia.(Approx): 5 mm/0.2" Shell Width(b): 37 mm/1.46"; Top Plate Size(d*e): 38 x 38 mm/ 1.5" x 1.5" (L*W) Wheel Dia.(a): 50 mm/2"; Total Height(c): 65 mm/2.56"