RilexAwhile 4 Pcs Black 1.5" Caster Set 2 Swivel 2 Rotary Brake for Shopping Carts, Hand Trolley, Tools, Small Equipment Etc. (1.5") Product Name : Caster Wheel;Material : Polyurethane, Metal; Weight : 707g Threaded Diamater : 8mm(M8); Threaded Length : 25mm/1"; Wheel Diameter : 40mm / 1.5" Top Diameter : 35mm/1.4";Overall Size : 90 x 80x 35mm / 3.5" x 3.1" x 1.4"(LWT) Package Content : 2 x Brake Caster Wheel2 x Swivel Caster Wheel Perfect caster for furniture , hand trolley , small equipment, carts, etc.