Soft PVC pad to be glued onto a PVC or Hypalon inflatable boat, designed to hold the Berkley mounting base with lock, which serves as the base for most Berkley marine accessories. It features grooves to easily follow the shape of the boat and provide extra grip. Supplied with four 1/4 x 7/8 (22 mm) stainless steel 304 bolts. Base dimensions: 158x113mm. This unique pad can also accommodate starboard mounts from other brands (using metric bolts). Important notice: before screwing in a starboard mount, always carefully measure the depth you can reach to ensure M6 bolts are not too long, to avoid damaging the boat. Chamber dimensions: diameter 32 mm, depth 12 mm.