Standard thread for easy installation. Note: Please confirm the barb size before placing an order. [O.D 5/16 inch Barb Fitting]Fits beer tubing that the ID little less than 5/16 inch . This tailpiece barb is larger than the common 1/4 inch barb and supports more flow. [Standard G5/8 Thread Hex Nut]The keg coupler connector is suitable for all the G 5/8 inch Thread A/ G/ S/ D type keg coupler and beer shank. The swivel nut make the installation easier and faster,the elongated Barb part allows the pipe to be installed deeper, and provides clamps to make the pipe fully stable and not easy to fall off. Material: Stainless steel colour: silver Package Contents: 4 x 5/8 inch G x 5/16 inch Barb fittings 4 x sealing washer / 2 x 5/8 inch G x 5/16 inch Barb fittings 2 x sealing washer Only the above package content, other products are not included. Note: Light reflection 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.