Hicool manufactures Brushless DC fans in varied sizes ranging from 60 mm to 280 mm. These fans are available in plastic blade as well as metal blade. Plastic blade DC fans are generally of sizes 60mm, 80mm, 92mm, 120mm and 172mm and metal blade DC fans are of sizes 225mm and 280mm. Hicool is a manufacturer of 12v DC fans, 24v DC fans, 48v DC fans and non standard voltages upon request. These DC Brushless Fans are available in both low speed as well as high speed depending upon the application.