NRS Latex Neck GasketLatex gaskets are tough, but they don't last forever. The NRS Neck Gasket is your go to choice when it's time to replace that vital part of a dry suit or dry top. This gasket will fit most dry suits or dry tops. Use a 9 1 2" 10" diameter form (see linked printed and video instructions). Kokatat suits require the larger form. The latex on this high quality gasket is 0. 6 mm thick. Linked here on the page are clear step by step replacement instructions.