36 Pieces Drip Irrigation Kit：Drip Irrigation Parts for 1/2 Inch Drip Irrigat...
Be sure of the sizes and buy fittings that "fit". If your tubes is 0.520", you need size 16mm not 17mm. 【Fits 1/2 Drip Irrigation Tubing】：These 1/2 drip irrigation fittings is compatible with most of 1/2" drip irrigation tubing (.560-.600" ID).