Genuine replacement Lay-Z-Spa Pump A Coupling Inflation Nut with Seal Brand New Lazy Spa Spare Part These will fit all airjet models and also hydrojet pro versions that have the coupling that splits in 2 with a nut and bolt on each side to hold them together. We do also have the very latest version for the hydrojet pro which has the coupling as 1 part instead of 2 halves., if you need this please message us and we can send you a link to the correct item. Genuine replacement part not 3d printed or any other cheaper versions like most sellers are selling.
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