DIG universal nut lock drip fittings are used to connect drip tubing and drip line with dimensions from 1/2 in to 5/8 in or 0.62 in OD to 0.71 in OD. They can be used to connect two different sizes of drip tubing, providing a simple solution when there is no clear information about the drip tubing or drip line size used. Used by both home gardeners and professionals, the Universal Nut Lock drip fittings are made of high-impact plastic for the connection of various sized drip irrigation tubing and drip line.