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

• Pin lock home brew keg connectors
• Specially designed for use with Becker kegs
• Includes both a gas in and beer out coupler
• Couplers feature 1/4″ thread connections
• The gray one connects to the CO2 gas-in post on any Pin Lock home brew keg; The black one connects to the liquid-out post on any Pin Lock home brew keg

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