SeaSucker 6in SeaSucker Mount w/Flat-Top Stainless Steel D-Ring Black. Seasucker's vacuum cups lend themselves to an almost infinite number of uses. If you need to attach something to a rigid non-porous surface without drilling any holes this is the best way to do it. Specifications for SeaSucker 6in SeaSucker Mount w/Flat-Top Stainless Steel D-Ring: Manufacturer: SeaSucker Size: One Size Length: 6 in Width: 6 in Diameter: 6.5 in Package Contents: SeaSucker 6in SeaSucker Mount w/Flat-Top Stainless Steel D-Ring Protective covers SeaSucker VM1014B: 6in SeaSucker Mount w/Flat-Top Stainless Steel D-Ring Black