KORAM Drip Irrigation End Closure Goof Plugs for 1/4&rdquo; 3/8&rdquo; Tubing Hose, Pack of 40, with Plant Garden Labels Plugs unwanted holes in drip tubing Made from ABS, for use with water pressure up to 50 PSI Precision Molded Barb: Ensures a tight and secure connection Extremely Durable Agricultural Grade: Plastic ensures long life. TIPS: Please put the hose and the connected part of the hose into the hot water for 10 seconds before assembling. It will be easier and as it cools down the tube will stay tight