Uxcell a15041300ux0036 Stem Caster Wheels Computer Chairs M10 Thread Stem 1.6 inch Dia Swivel Caster Wheel 2Pcs Main material: stem caster wheel; Package Content: 2Pcs x stem caster wheels Product Name: stem caster wheel; weight: 302G Features: swivel; main Color: black, Silver tone Overall size: 60 x 33 x 85mm/2.4" x 1.3" x 3.3" (l*w*h); wheel size: 40 x 22mm/1.6" x 0.9"(D*t) Thread size: M10 x 25mm (d*l)