Drain Coupling, 8 to 6 in. Straight Adaptor, PVC Rubber
Fernco 3 in. x 2 in. PVC DWV Mechanical Flexible Coupling P1056-32 - The Home Depot
Mission Rubber MR56-43 MR56-43 | City Plumbing & Electric Supply
CDL. REDUCERS RUBBER COUPLINGS AND CLAMPS
Fernco 1-1/4-in Schedule 40 PVC Coupling in the PVC Pipe & Fittings department at Lowes.com
Polypipe Boss Pipe Rubber Connector Pushfit Waste Adapter Reducer White 50mm x 32mm - Amazon.com
Amazon.com: 4 inch to 2-1/2 inch Reducer with 4 inch Flexible Cuff Rubber Coupler Fitting and Stainless Steel Hose Clamps with Turn Key Thumb Screw to Easily Tighten and Loosen • Designed
Rubber Floor Transition Reducer Piece – FUJI Mats
Drain Coupling, 6 to 3 in. Straight Adaptor, PVC Rubber
5" ID to 4" ID Rubber Reducer Hose for Air Intake RHH-5-4
3-inch to 2.75-inch Rubber Reducing Insert: Sy-Klone International
4" x 3" Flexible Rubber Reducing Coupling - PexUniverse