This Surge Hatch cover is made to fit roto-moulded Oval hatch rims which are integrated into the manufacture of a plastic kayak or ski rather than those attached later. Roto Moulded rims have a more rounded lip than most other styles and often need a hatch to suit this larger rounded lip.
Featuring a stiffer central panel and softer edges it will seal easily around the rim and the central stiff section makes it easier to line up as well as providing implosion resistance against large dumping waves in extrem surf.
This hatch has a nominal size of 44 x 26 cm this means it covers a hole that is about this width and length.
The actual hatch rim is larger than this (and so is the hatch cover) and it is the external rim size that is important (not the internal or hole size)
Hatch hole size may vary significantly depending on the width of the rim (thinner rim = larger hole). The Hatch hole in a roto-moulded kayak is cut into the kayak’s deck and it’s size can vary a lot depending on the method used to make the hole and manufacturers directions even if the external rim diameter is the same.
In this case the external rim diameter is roughly about 27.8cm x 45.6 cm See pictures.
This Hatch will fit current models of the Surge Drummer, Surge Snapper, Liker Onwind, Baysport Breeze V5, Liker Spirit 505, Baysport Downwind
Possibly the Nordic PE.
This is not an exhaustive list other kayaks may also suit, the best way is to try it on (bring your kayak in even) but otherwise measuring is the second best option.