RotoTank™ Barrel PP Insert Nipple 15mm Code – VET261 20mm Code – VET262 25mm Code – VET263 32mm Code – VET264 40mm Code – VET265 50mm Code – VET266 Polypropylene Nipple Insert Nipple Barrels are nylon insert and threaded fitting for Class 3 and 6 low-density polyethylene pipes ensuring secure connections and reliable performance in irrigation systems. Range of sizes: from 15mm to 50mm