Height of spike:21cm/8 inch ,Adjustable spray distance from 0 to 20 inch;Irrigation angle: 360 degree ,suitable for 4mm or 7mm tube. Adjusting the water flow: The water flow can be adjusted by rotating the water outlet cover, adjust the amount of water according to actual needs, let plants grow healthily and save water resources . Irrigation Angle: Each dripper has 8 exit holes at the top, provide 360 degree coverage in multiple flow directions, unique umbrella spray mode. Durable Material:The material of adjustable irrigation drippers is sturdy pp plastic, not easy to wear, durable, light weight, service you for a long term. Used Widely: Suitable for lawn, garden, self plant, flower beds, vegetable gardens, herbs gardens watering, get a green and beautiful landscape.