This listing is for a set of four 5x1-1/4" swivel polyurethane casters (2 with brake) with a delrin bearing and a 3-1/4 x 3-1/4" mounting plate. This is an aftermarket replacement for Vulcan Range model numbers 497001-00001, 497002-00002, 497001-1, 497002-2, 410118-20 and 410118-21. This mounting plate will also work on Pitco equipment.