The Claber 91218 In Line Drippers have a adjustable flow rate between 0 to 10 litres per hour. The can be installed into 1/2" (13-16mm) main tube for 1/4" (4-6mm) feeding tubes. Super simple to install and easy to clean. 

• Claber In Line Drippers
• Model 91218
• 0 to 10 litres per hour
• Pack of 10