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 coupler connector is suitable for all the G 5/8 inch Thread A/ G/ S/ D type coupler and beer . The swivel nut make the installation easier and faster,the elongated Barb part allows the pipe to be installed , and provides 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 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. 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 coupler connector is suitable for all the G 5/8 inch Thread A/ G/ S/ D type coupler and beer . The swivel nut make the installation easier and faster,the elongated Barb part allows the pipe to be installed , and provides clamps to make the pipe fully stable and not easy to fall off.