1. Accurate position cleaning, reduce dust to protect , turn dust into easy-to-clean water, use the least water to clean up the most dust, improve cleaning effect, keep the element's face clean, and improve machining accuracy and processing efficiency. 2. fix the sprayer on the machine with the stainless steel fixing bracket, then put the water pipe through the nut at the tail of the sprayer, insert and tighten it. Then, you can start working without dust blocking your view. Size: about 135MM/5.31in Nozzle diameter: 6mm/0.23in Clampable thickness: within 5mm/0.19in Colour:Photo Color Material:plastic+copper Package Contents: 1 x Dust Remover Water Sprayer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.