89MM (3-1/2″) 102MM (4″) 3.5″. 102MM (4″) 115MM (4-1/2″) 4″. Type: Weld on Ferrule Set. Pipe OD Ferrule OD Fits Tri-clamp. 1 Pcs Sanitary Pipe Weld on Ferrule Tri Clamp Type Stainless Steel SUS 316 from U.S. Warehouse.