VM1013BSeaSucker 4.5" Vacuum Mount w/ Flat-Top Stainless Steel D-Ring, Black Model: VM1013B All the awesomeness of the original 4.5" SeaSucker, but with a stainless steel D-ring for holding ropes, straps, etc. Our 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 ColorBlackVacuum Mount4.5 in, rated to pull up to 120 lbsD-RingFlat-Top stainless steel