Specification: Material：T-304 Stainless Steel Clamp Inner Diameter: 7.8cm Clamp External Diameter: 9.2cm Clamp Height: 1.9cm Flange Inner Diameter: 2.5\'\' Inch (63.8mm) Flange External Diameter: 8.2cm Flange Height: 1.75cm FeatureV-Band clamp is perfect for requiring frequent removal.two Flanges and one V-band clamp，providing a perfect overlap seam for welding.The exhaust clamp design allows for a gasket free seal.Packing Includes:2x Stainless Steel V-Band Clamp 4x Iron V-Band Flanges（Flat Flange) Notice * No instruction included; professional installation suggested. * For any needs please contact us