Ace Race Parts 22208 4.000 x 3.500 Reducing V-Band Assembly Male/Female 304 Stainless - Quick Release ClampAce Race Parts 22208 4. 000" x 3. 500" 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. 000" ID Female Flange and a 3. 500" ID Male V Band Flange in a single Quick