With plastic flexible body, light weight easy to install in all directions anglesWidely used for lathe, milling, CNC machine, hydraulic machines water coolingRound nozzle inner diameter: approx 0 1 inch / 0 3 cmThread Outer Diameter: Approx 1/2 inch / 12 5 mmProduct Name: Coolant Hose; material: plasticDue to manual measurement, there will be some errors Plastic Flexible Water Oil Coolant Pipe Hose Round Nozzle Feature: 1) Light Weight Easy to Install with Any Direction Angle 2) Good Pipes Used to Make a Third H 3) Just the Thing to Direct Coolant to Cutter Tips on Lathe and Milling Machines 4) Stable Characteristics High Reliability 5) Used to Make an Extremely Useful inhelping Hin when Crocodile Clips Attached 6) Brilliant for That but No Idea About Their Designed Use