From the product description, check product page for current description, price and availability:

Do you having a kegging system with beer faucet, and want to bottle kegged beer? The Nukatap Counter Pressure Bottle Filler is an easy way to fill bottles directly from your beer faucet while preserving carbonation in the bottle. The O ring sealed beer inlet nipple press fits into any beer faucet with 10.0 mm inner diameter spout/nozzle including Nukatap, Intertap, Perlick Forward Seal, and Ventmatic faucets.

For the gas inlet side, a male ball lock fitting is provided, so you can use any ball lock gas connector to attach the C02 purging gas. This gas should be at the same pressure as your kegerator dispensing gas, and should be connected to your kegerator C02 regulator. Not Included: you will need a spare gas line from your regulator kegging system with a female ball lock on it to connect your purging C02 gas.

The integrated counter pressure relief valve gives you control of the counter pressure and thus the filling speed. How fast the bottle can be filled without too much foaming depends on CO2 level, beer temperature and bottle temperature. Keep everything cold for the best results.

Fits all 16 ounce and 32 ounce ‘Grolsch’ style swing top bottles.

From the product description, check product page for current description, price and availability:

Compact ball lock spunding valve features a 0-30 PSI gauge and now features an adjustable manual pressure pull ring relief valve (adjusts from 0-15 PSI). The adjustable manual pressure release can be removed, and a corny keg pressure relief valve installed in its place. The gauge features a standard DuoTight 8mm stem, and can be replaced with our DuoTight gauges, like our items C18, Z97, and E69 if desired.

Lots of ways to use this and upgrade it. If you want more accuracy than the manual adjustable spring loaded relief valve, you can upgrade with our item C16 DuoTight Blowtie valve, which has a rubber diaphragm valve which will always be more accurate at low pressures than the included spring loaded adjustable relief valve. If you do this, you will also need DuoTight Joiner, item number C70.

You can also replace the manual adjustable relief valve with preset keg relief valves like our item G65 (17 PSI) or B54 (0-30 PSI).