Product Information Material: Aluminum Flange Size: 3" Length: 6-7/8" Select a Product Part NumberIncludesSeal 3001SQ-SPFlapper return springsMetal-to-metal 3001SQ-BSPFlapper return springsBlack Buna 3001SQ-NMetal-to-metal 3001SQ-SWhite silicone 3001SQ-SSPFlapper return springsWhite silicone