High efficiency and environmental protection, material saving and abor saving.4- hole design, which can reject blockage and spray more evenly. Hopper is made of fine quality stainless steel material, which is anti-rust. The air valve is made of fine quality brass that has a long service life. Large capacity design, easy to operate, convenient and fast.Specifications:Material: stainless steel+copperColor: silverType: roof cement mortar sprayer machine Mode of operation: use with air compressor or air pump Working air pressure: from 4 to 6 ATM Distance between wall and mortar sprayer: maximum from 50 to 100mm Spraying hole quantity: 4pcsCapacity: 4L Flow rate: 50mlValve: includes 1/2" female swivel, a 1/4" air plug with 3/8" NPT male Valve pressure: 120 PSI, deliver up to 100 CFM Outer hole diameter: 18mm/ 0.7in Inner hole diameter: 2mm/ 0.1in Suitable for gypsum, cement, mortar, concrete, stucco and other thin paste materials spraying construction Item size: 770* 225* 210mm/ 30. 3* 8. 9* 8.3in Item weight: 1820g/ 4.0lb Package size: 300* 230* 210mm/ 11. 8* 9. 1* 8.3in Package weight: 1850g/ 4.1lbNote: Need to configure a 0. 6 cubic meter, 8kg exhaust pressure or larger air compressor supporting use. Package list: 1* Roof Mortar Sprayer Machine