◉ Universal Office Chair Casters – Compatible with most standard office chairs, these 7/16 (Φ11mm) x 7/8 (Φ22mm) size polyurethane caster wheels reduce the stress on your flooring for prolonged use without fear of damage. Replacement casters for Herman Miller chairs such as the Aeron, Embody, Mirra, SAYL, and Setu chairs; for Steelcase Chairs such as the Leap, Gesture, Amia, Think chairs. ◉ Premium Floor-Safe Caster Wheels are produced by dual injection molding and are more wear and tear-resistant. The polyurethane tread material will not peel off for at least five years. Our polyurethane chair wheels are safe on hardwood flooring, carpets, tiles, and even hard rubber under chair office mats for scratch-resistant durability. ◉ Silence and Smooth Rolling Design – A twin wheel, pre-lubricated design, our polyurethane chair wheels roll much more quietly, creating a more pleasant working environment; Certified Compliant with BIFMA X5.1 Durability Standards for Chair Casters. ◉ Heavier Load Capacity – Handles capacities up to 538 lbs per set. Our replacement caster wheels provide heavy-duty strength and resilience for long-lasting durability you can count on for home or office use. ◉ Quick and Easy to Install – The installation step is straightforward; without using tools, pull off old casters from your office chair, then firmly insert the new casters and ensure they are secured. UPC 376125639846 Color Black / Black / 3 Inch Model 7506BUB-16 Brand Name Enjoy 滾動幸福 Enjoy caster Caster Type Stem, Swivel Item Weight 16 ounces Part Number 7506BUB-16 Wheel Width 2 Inches Manufacturer ENJOYING GO CO., LTD. Load Capacity 270 Pounds Material Type Polyurethane Mounting Type Stem Mount Item Dimensions 2.09 x 1.97 x 2.32 inches Included Components Casters Surface Recommendation Multi-Surface