Perma CLASSIC can be used for all applications with ambient temperatures of 32 °F to 104 °F (0 to 40 °C). The reliable operating principle is based on an electrochemical reaction. The lubrication period is determined by color coded activator screws. Depending on your application's requirement, you may choose to discharge 120 cc in a period of 1, 3, 6 or 12 months. The activator screw generates pressure (max. 58 psi / 4 bar) which moves the piston forward and continuously injects small lubricant amounts into the lubrication point. Perma CLASSIC is fully dust and water proof and can withstand impacts and accidental knocks. Please not this product is filled on Order and will take 10-days for delivery. sold by the Case of 10.