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On older Poseidon Cyklon 1st stage SCUBA regulators, the standard thread size of all ports were 1/8. Today, all LP ports are 3/8 and all HP ports are 7/16 sized.
If you have an older style 1st stage, this adapter can be used to attach a standard High Pressure Hose.
![[1,600 ct] Boba Straws | Diagonal Cut | Individually Wrapped | Blue (0.39" x 9")](https://www.trendfiz.shop/image/1600-ct-boba-straws-diagonal-cut-individually-wrapped-blue-039quot-x-9quot_YxS4yz_285x.webp "[1,600 ct] Boba Straws | Diagonal Cut | Individually Wrapped | Blue (0.39\" x 9\")")
