Office Chair Wheels Replacement Rubber Chair casters for ALL Floors Including Hardwood Floors, Office Chair Castors for Home and Office Chairs to Replace Office Chair mats, 11x22mm, Clear (NOT 1KEA)IMPORTANT: The stem size of Lifelong Office Chair Wheels are 7 16" x 7 8" (11mm*22mm) in diameter and will not fit most 1KEA chairs and some of brand chairs. Please measure and confirm what size chair wheels is suitable for your chair before purchasing. If you order the wrong size for your chair, please contact Lifelong Support and we will assist you. THE LAST OFFICE CHAIR WHEELS YOU'LL NEED Not all office chair castors are created equal. Our office