Fender "Sphinx Glides" for amps. BIG ones as found on recent models, measure 1.25" diameter, nickel plated steel cup with rubber insert, set of four with screws (original Fender glides from the '60s-80s measured 1"). While these new glides are larger, they do 'retrofit' the old amps and are the best currently available part. Set of four. Brand New. Genuine Fender 0993900000. UPC 717669448752.