304 Stainless Steel Flange, CNC Machined, Male&Female Design with Groove ( Lip ) at the end. 2 x 3" ID Flange ( tiny bit bigger ). 304 Stainless Steel Clamp. 1 X V-band Clamp at around 3 and 3/4". Ideal for turbo application, exhaust systems such as down pipe, catback.