Max water flow rate of our drip emitters is 25 gallons-per-hour, suitable for lawn, garden, flower beds, vegetable gardens, herbs gardens, etc. Especially for large garden. Spray diameter from 0 to 10 feet. Flexible adjustable water flow while using, no matter you want it larger, smaller, or turn off. Our drip emitters can achieve what you need. These drip emitters are ONLY suitable for 1/4 inch irrigation tube with 4mm inner diameter, also can be inserted to a 1/2 inch or larger irrigation tube directly. Make sure soak the end of hose by hot water before connecting. Common matching accessories have 1/4 inch couplings and barbed tees. These drip emitters are detachable and very easy to clean. Don't worry about clogging.