The La Farah Drip Irrigation Fittings Kit For 1/2 Inch Tubing Is An 18-Piece Set Product Details The 1/2" drip irrigation parts kit includes 3 tees,3 switch valves,3 T connectors,3 pcs 6 way connector ,2 elbows,4 end cap.you can create your own drip irrigation system with these practical fittings. Drip Irrigation fittings for 1/2 inch irrigation tubing - the outer diameter of 0.635-0.65 "(16mm-16.5mm) irrigation tubing. If pipe has an outer diameter of more than 16.5mm, it is not recommended to buy it. 1/2" Drip irrigation parts with barb design for a secure leak-proof connection the twist lock adds extra hold to the tubing for a secure connection! Made of highly durable UV-resistant and chemical-resistant materials to assure long life. Maximum Operating Pressure: 45 PSI,Maximum Flow Rate: 80 GPH Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.