... 6. Roll Length: 500m, 1000m, 1200m, 2000m Features 1. Each dripper has its independent filter to prevent particulate matter from entering ... , anti-blocking and ageing resistance and long service life. 5. Dripper spacing and flow rate are accurate, with labyrinth design. The ... coefficient difference is less than 2.0%. 6. Dripper flow rate, spacing and roll length can all be adjusted ...