EK-Pro G1/4 Barb Fitting 6mm - Nickel is a soft-tube barb fitting designed for use with flexible soft tubing such as PVC, EPDM, Norprene, silicone, or any other type of compatible flexible tube. It pairs ideally with the EK-Pro Tubing 6/12mm Reinforced EPDM 1m - Black. This product is a high-flow barb fitting and is suggested to be used with hose clamps or similar substitutes for the safest operation. The barb is made from nickel-plated CNC-machined brass with quality O-rings. These fittings can be either tightened by hand or by using a 10mm spanner key tool (not included). Technical data: - Thread: G1/4" BSP - Supported tube: 6mm inner diameter - Outer diameter of the tube: unlimited - Compatible tubing: PVC, EPDM, Norprene, silicone, and most types of the flexible tubes Model: TR-3831109904732-2P