Ace Race Parts 22209 4.500 x 4.000 Reducing V-Band Assembly Male/Female 304 Stainless - Quick Release ClampAce Race Parts 22209 4. 500" x 4. 000" Reducing V Band Assembly "Male Female" 304 Stainless Quick Release Clamp If you're looking for a Reducing V Band Assembly look no further! For applications where transitioning from one tube size to another is required, this 304 Stainless Steel V Band Assembly eliminates the need for additional fabrication components by offering both a 4. 500" ID Female Flange and a 4. 000" ID Male V Band Flange in a single Quick