Check the listing for details. Irritec Perma-Loc Tubing Reducing Cross. Condition: New. Listed at 11.54 USD. About Drip Depot Perma-Loc Drip Irrigation Fittings:Perma-Loc fittings and adapters are heavy duty reusable connectors for all your connection needs. They are very easy to use and require no special tools. Perma-Loc fittings are available for both Tubing and Tape. The tubing connectors can be used on blank tubing as well as drip line. To Use: Simply twist the locking collar back towards the center of the fitting exposing the barb. Then push tubing or tape over barbed end. Next, hand-tighten locking nut over tubing or tape for a permanent secure fit.; To Remove: Just loosen locking nut, pull tube off and re-use as needed.; Perma-Loc fittings look similar to traditional flange and locking nut plumbing connections; however, in most cases, they work differently. Unlike a typical locking nut which comes off the fitting and slides over the tubing, a Perma-Loc locking nut is not removed from the fitting. This reusable fitting will connect various sizes of poly tubing in a cross pattern. Perma-Loc SeriesNominal SizeAcceptable Inside Tubing Diameter Acceptable Wall Thickness 5003/8".510" to .580".035" to .055"6001/2".590" to .630".025" to .050"8003/4".790" to .845".045" to .065"10001"1.025" to 1.085".045" to .070" Perma-Loc 500 Series adapters and fittings allow you to connect the smaller .520" ID (often called small 1/2") tubing to different sizes of poly tubing. Perma-Loc 500 Series fittings are compatible with any poly tubing with an inside diameter of approximately .520". The most common manufacturers of this type of tubing are:RainDrip .520" ID (Inside Diameter)RainBird .520" ID (Inside Diameter)