Axe Sickle (Pack of 50) Drip Emitters Perfect for 4mm / 7mm Tube, Adjustable 360 Degree Water Flow Drip Irrigation System for Flower beds, Vegetable Gardens, Herbs Gardens. Attention: Water exit: Top Height of spike: 13cm / 5.1 inch Range:Adjustable spray distance from 0 to 20 inch;Irrigation angle: 360 degree Suitable for 4/7mm (Inner/Outer diameter) tube. Make sure the hose is softened before connecting. A firm push with a little added wiggling gets the hose on with sprinkler.you soak end of 1/4" tubing in VERY hot water before attaching to the dripper. I would recommend filling a thermos with boiling water to dip your 1/4" hose into as you assemble your lines. Be very careful you don't spill boiling water on yourself and wear gloves to handle the hot end. Directs water exactly where you need it in a wide variety of planting areas Applies water similar to a spray head on an underground system. Water flow can be adjustable Adjustable flow rate from 0 to 13 gallons-per-hour,Suitable for pots, tubs, ground cover, landscaped gardens and Etc... Money Back Guarantee: Any quality question, just feel free to contact us, We will reply within 24 hours to resolve.,All Axe Sickle products are fulfilled by Amazon with 100% guarantee fast shipment and good customer service.