Caster Swivel, For Use With Grainger Item Number 12R950, 12R951, 12R952, 12R953, 12R954, 12R955, 12R956, 12R957, 12R956, 4VDN5, 4VDN6, 4VDN7, 4VDN8, 4VDN9, 4VDP1, 4VDP2, 4VDP3, 4VDP4, 4VDP5, 4VDP6, 4VDP7, 4VDP8, 4VDP9, 4VDR1, 4VDR2, 6DHH6, 21ML57, 21ML62, For Use With Mfr. Model Number Speed Scrub 5, Speed Scrub 7, Fits Brand Nobles, Tennant, Includes Caster Swivel