Tefen 12255605033 Nylon 66 Hose Fitting Coupling - 5/16" x 3/16" Hose ID, Gray (Pack of 10) - Ideal for Plumbing, Irrigation & Industrial Fluid Transfer Systems

Had a hard time finding the right parts to fix my sprinkler line. This worked perfectly. A little more expensive than what I was hoping to find, but it was the only thing that would work.Dimensions are as noted and provides a great connection. Whatever type of plastic it is it appears to be of good quality. Other connectors that I have used were made of a cheap plastic that was brittle. These are really nice and feel like nylon. Tip:. Don't try to twist them on. Rather walk then on side to side motion.The 3/4" Tefen hose fitting slips into standard 3/4" drip irrigation tubing way too easily and leaks heavily when pressurized. Adding hose clamps did not stop the leak. Another brand of connector I found at the local hardware store measures .012" larger in diameter at the largest part of the barbs and it was just tight enough to create a watertight connection. I still gave it 4 stars because it may work on other kinds of 3/4" tubing and the overall quality of the piece looks fine, but they should have better described compatibility in the product description.Awesome! They are made well and fit snug enough that I would probably trust it without the clamps!I didn't realize it was 10pcs so ended up with 20.Perfect for water hoses!While this looks like a good product, I find it curious that the measurement you select from the drop down are the outside diameter of the end of the lip (ie not including the ribs) and not the diameter pipe this will fit. I guess maybe I don't have enough experience, but this was something I looked for when purchasing and it is not described anywhere. So for mt 5/16 outside diameter pipe I suspect that I need 3/16 connectors...I guess we will see when it comes in. The description could be a lot more descriptive (hence the 3* rating) but I am glad we have this site as I could not find these connectors anywhere locally.Update: after ordering 3/16 connectors for my 5/16 line I installed these no problem (warm up the plastic line with hot water). You also need clamps FYI, 8mm of these just barely works Tefen Acetal Snap Grip Hose https://www.amazon.com/dp/B006OG427G . In the end I am very happy I could get these online...just frustrated that they did not have sufficient information to order correctly the first time. Yes OD in the brand name appears to mean outer diameterI am using them on lab hoses for extensions on several vacuum lines. Solvents and acids cause them to need to be replaced now and then, but they work fine and are durable for a very long time.. On air or water only tubes, I imagine they would last indefinitely. Thank you.Works greatPerfect for fixing hoses.