uxcell 8mm Threaded Stem 1.5 Inch Dia Double Wheel Swivel Locking Caster 4pcs Main Material: Plastic, Metal; Package Content: 4 x Threaded Stem Caster Wheel Product Name: Threaded Stem Caster Wheel; Weight: 182g Main Color: Black,Silver Tone; Overall Size: 62 x 54 x 36mm/2.4" x 2.1" x 1.4"(L*W*H) Wheel Size: 4 x 1cm/1.5" x 0.4"(D*T); Threaded Stem Dia: 8mm/0.32" Threaded Stem Length: 15mm/0.6"; Type: 360 Degree Rotation,Dual Wheel,Brake Lock