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

• Highest quality Stainless Steel and durability for both commercial and home use
• White Ball lock for gas disconnect and black for liquid disconnect
• These fittings make joining hose easy especially if you want to use the 4mm ID, Tubing, Beer Tap, Co2 Regulator, etc
• Fits both the John Guest and stainless push fit connectors
• Look fantastic on kegs and are extremely durable, no leaks, fit and finish are perfect

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