This is a straight 21" Liquid Dip Tube for 5 Gallon Soda Kegs. O.D. Diameter is 5/16". These are used stainless steel dip tubes recycled from failed kegs. They are fully functional, approximately 21" long without ears under the flange. Please check out the image gallery pictures for the difference of tubes with ears verses dip tubes withno ears. O-ring is not included.