This is a Perko 0513DP8 O-Ring 1-1/2in F/DECK FILL 2/B. This o-ring is used on Perko deck fillers to help maintain the seal between the deck filler and the deck.
Wally Plug with O-RingsFatSac Replacement Ballast Bag Plug is used to plug unused holes on FatSac ballast bags. Fits the proprietary thread pattern used on FatSac bags making a perfect water-tight...