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

• Stainless steel probe ★ the D system keg coupler’s probe is made of stainless steel that will not wear away over time and your beer will no flavor at all. Keg coupler’s body is made from chrome-plated brass
• No gas leaks ★ this keg coupler features a 55-65 PSI pressure relief valve with a food grade silicone O-ring to avoid relief valve leakage of the keg coupler. The keg coupler meeting all kinds of high pressure beer that needs You, this is definitely the best GIFT for lovers of home brewing.
• Perfectly beer line fitting ★ perfectly beer line fitting ★ this Sankey keg coupler came with a fitting for the beer line so you Didn’t have to buy it separately, No more wasting time waiting, tap keg now, Cheers ! ! ! !
• Easy to install ★ come with two tailpiece set & hose clamp ★ the Sankey keg coupler is G5/8 thread( U. S. Beer industry standard). This D coupler has a 3/8″ Od gas/beer tailpiece to fit 5/16″ Id hose
• With a pressure relief valve ★ The pressure relief valve of keg tap coupler will automatically open on about 53 psi
• material type: Stainless Steel

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