Hicarer 5 Pcs 4'' 100mm Extra Large Chair Wheels Heavy Duty Twin Wheel Caster 7/16" x 7/8" Grip Ring for Office Chair Soft Nylon Furniture Wheel Hardwood Floor Safe Replaces Mat

["Enhanced Stability with Extra Large Size: upgrade your chair's balance with our 4-inch caster wheels; The larger wheel size provides a wider base and improved steadiness compared to standard small casters; With a mounting height of 4-5/16 inches and a grip ring stem size of 7/16\" x 7/8\", never again will you push back quickly on carpet to grab something and almost fall over because of small caster wheels","Floor Protection with Reliable Material: made of sturdy plastic, these casters are not only durable but also protect your floors and glide easily over hardwood floors and carpets, preventing scratches or marks","Easy to Install with Twin Wheel Casters: experience an effortless installation process with our heavy duty office chair wheels; To assemble them, Simply pull out the old casters from your chair base, line up the new stem with the open hole, and push firmly until they click into place","Reliable Heavy Duty Capacity: built to withstand immense pressure, each of our office chair casters wheels carries a heavy duty capacity of up to 175 lbs, with a total capacity of 875 lbs; Ideal for heavy individuals, people with limited mobility or need higher seats, our casters are suitable for maintaining stability and strength","Smooth Rolling on Most Kinds of Floor: our replacement caster wheels work for all chair brands with caster stem holes that are 7/16 inches; Designed with a wide range of applications in mind, these chair casters move smoothly on most kinds of floor surface; Whether it's hardwood, tile, or carpet, our casters ensure easy and smooth movement while shielding your flooring from damage"]