<p>2pcs Sandblasting Nozzles: 1pcs 35X20X3Mm 1pcs 35X20X4Mm Suitable for manual box sandblasting machines and box type automatic sandblasting machines. The burst of the nozzle accelerates the air and the mixture flows out of the tube end with abrasive. The cone and length of the inlet and outlet nozzles determine the pattern and speed of the abrasive leaving the nozzle. These replacement sandblasting nozzles are suitable for many sandblasting cabinet units. Low density, high hardness, corrosion resistance. Low thermal conductivity. Super durable. Density: greater than or equal to 2.48/cm3 Microhardness: greater than or equal to 3500kgf/mm2 Flexural strength: greater than or equal to 400MPa Melting point: 2450 degrees Celsius Life of each material: Steel shot: 2000-2500h, Quartz sand: 1000-1500h, Corundum: 500-1000h Size: 35x20mm/1.38x0.79 inch Aperture: 3mm 4mm Model: Sandblasting nozzle Power type: Pneumatic Usage: Home DIY Cup capacity: Other Applications: Sandblasting nozzle Color: Black Material: Boron carbide Package Contents: 2 x Sandblasting nozzle Operation: 1. The operator inserts the washer nozzle into the contractor nozzle holder nozzle and the nozzle screw, and turns it by hand until it rests firmly against the washer. 2. After all related equipment is properly assembled and tested, the operator points the nozzle to the surface to be cleaned and presses the remote control handle to start sandblasting. 3. The operator holds the nozzle 18 to 36 inches from the surface, moving smoothly at a speed that produces the desired cleanliness. Each step should overlap slightly. 4. The operator must replace the nozzle once the orifice wears more than 1/16 inch of its size. Above package contents only, other products are not included. Note: Light and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The allowable error in measurement is +/- 1-3cm. </p>