SPR Spacer Rings Home » Products » SPR Spacer Rings MIFAB spacer rings are available in either 5” or 6” round (specify size and material -1 for nickel bronze or -3 for stainless steel), are 3/8” high and machined on the underside to fit into the existing MIFAB 5” or 6” round floor drain strainers. Catalog Catalog List Pricing Current Catalog: MPB-2022 Downloads Downloads Features & Benefits Typical Installations Outlet Selection Guide All Star Cover Flyer Drain Specifications Videos Videos Top Set Drain Demonstration All-Star Drain Video Return to Products