Check the listing for details. 20pcs Drip Irrigation Coupling 16mm Barbed Locking Fitting with Washer Blue. Condition: New. Listed at 18.50 USD. What is This?.These drip irrigation barbed locking fittings are commonly used for 16 mm drip tape or tubing. They can be applied for various occasions, such as garden, residential, farm, horticulture, agricultural watering applications and so on.What will I get?Material: PEColor: Black, BlueFit for Drip Tape: 16mm / 0.63inchSize: 65mm x 25mm / 2.56inch x 0.98inch(L*D)Barb OD: 16mm / 0.63inch, 13mm / 0.51inchWasher Size: 24mm x 12mm / 0.94inch x 0.47inch(D*H)Package Content: 20Pcs x Barbed Locking Fitting, 20Pcs x WasherAre there any advantages of the product?Made of PE plastic material. Lightweight and durable to use.How to use it?Drill a 14mm hole on the pipe, and put the washer, insert the barbed end. On the other end, loosen the blue cap, insert the drip tape, and then tighten the cap, it will fit tightly.