This series is made of 1/4 thick cold rolled steel; designed, formed, and welded for optimal mobility and made to withstand the rigors and abuse typically seen in Medium duty applications. Double Ball raceways and a 5/8 nut & king-pin are standard features; however we also offer a rivet kingpin version & a kingpinless version. Poupular applications may include; various carts, trucks, dollies, racks & equipment, for almost every industry including industrial, warehousing, hospitality, institutional, food service, food processing, retail display, and countless other medium duty applications. Features OEM PREFERRED SERIES MAJORITY OF THIS SERIES & WHEELS ARE NSF LISTED RoHS COMPLIANT DOUBLE BALL RACEWAY WITH 5/8 KINGBOLT MATCHING TOTAL LOCK CASTERS AVAIALBLE GREASE FITTING IN RACEWAY & AXLE FOR MAINTENANCE ZINC PLATED / RUST & CORROSION RESISTANT PHENOLIC WHEEL IS STRONG AS STEEL NON-MARKING WHEEL HIGHLY RESISTANT TO CHEMICALS. TOP PLATE SIZE: 4" X 4-1/2".BOLT HOLE SPACING: 2-5/8" X 3-5/8" (Slotted to 3" x 3"). SWIVEL RADIUS: 4-1/4 (INCREASES W/ CERTAIN BRAKE OPTIONS). WHEEL DUROMETER: 90 SHORE D (+/-5). This item is in the category "Business & Industrial\Material Handling\Casters & Wheels\Casters". The seller is "casterhq" and is located in this country: US. This item can be shipped worldwide.