Use these for ball lock kegs. 1/4 inch connectors - barbed style for easy slip-on of gas and beer linesWork with 3 gallon, 5 gallon, and 10 gallon soda kegsWork with 5/16 inch and 1/4 inch inner diameter gas line tubing and beer line tubingball lock is for gas inBlack ball lock is for beer outQuality construction - Stainless steel posts, barbs, and ball lock. Sturdy plastic surroundThis Ball lock disconnects for soda kegs ( kegs) is completely new--not refurbished. It fits all ball-lock that require the standard disconnects. It has a white and a black color disconnects.Material: plasticColor: gray white + blackType: new ball lock disconnectsPackage includes:2* gray-white threaded heads2* black threaded headsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.