K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 3.5 In, Filter Height: 6.5 In, Flange Length: 1.25 In, Shape: Round Tapered, RU-4630 : Amazon.it: Auto e Moto
JIS & ASME PIPING FLANGE (DIMENSION LIST)|HISAKA WORKS,LTD. Valve Division