ASI 5 Gallon Ball Lock Keg NSF Metal Strap Set of 4 For home brewers with beer, wine, coffee, kombucha and juice applications New, not refurbished or used kegs; Pull-ring style pressure release valve in lid Pull-ring style pressure release valve in lid; Ball lock valve; Permanently molded rubber bottom skirt For a single keg please see model CKN5INX; Food-grade 304 stainless steel construction Fully NSF (National Sanitation Foundation) approved beverage safe and with ongoing compliance via NSF monitoring for highest food safety design and quality of materials used