Fits all major of tubing 1/2 inch, 16mm - Approximately .520 ID Range;High Impact Plastic ConstructionEasy Install - Use these durable irrigation fittings to your connect 1/2 inch drip irrigation tubing.SIMPLE TO INSTALL. Secure and easy installation without glue, tools, or clamps. Simply push the tubing firmly over the barbs for a very tight fit that won't leak. If desired you may use a heat or blow dryer to soften of the tubing before inserting.Colour:BlackMaterial:plasticSize:16mmPackage Contents:6 * T type tee connector6 * Elbows6 * Couplings6 * End PlugsOnly the above package content, other products are not included.Note: Light 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.