StarTech.com Heavy Duty Casters for Server Racks/Cabinets, Set of 4 Universal M6 2-inch Swivel Caster Kit, 45x75mm Pattern, Replacement Caster Wheels for 4 Post Racks, Steel/Plastic - 4-Pack Rolling Caster Kit (RKCASTER2)

INDUSTRY-LEADING SUPPORT: StarTech.com offers lifetime product protection and free lifetime technical support on these server rack casters wheels, and has been the choice of IT professionals and businesses for over 30 years TECHNICAL SPECIFICATIONS: Bolt Pattern: 45x75mm (1.8inx2.9in) | Wheel Size: 2inx1.7in (50x43mm) | Material: Cold-Rolled Steel & Plastic | Included Hardware: 18x M6 Screws, 18x M6 Nuts, 18x Washers | Number of Casters Included: Set of 4 HEAVY DUTY LOAD CAPACITY: Tested to 1.6 times their rated load capacity to ensure performance, these heavy duty casters/wheels, can individually support up to a stationary load of 550 lbs (250 kg) or a rolling load of 165 lbs (75 kg) 45MM x 75MM BOLT PATTERN: This caster kit can be used on any rack with a 45mm x 75mm bolt pattern to replace damaged casters and upgrade a floor rack to a rolling rack for additional mobility 2-INCH CASTER WHEELS: Four pack of universal swivel casters can be used as replacements on portable/mobile 4-post racks such as RK1833BKM, RK2433BKM, RK4242BK24 or to convert a floor rack to a rolling rack when casters are not included