Belt Guard Aftercooler for 5-7.5 Horse Power Motor 3/4 Inch Female NPT Fitting Compressed air can reach temperatures upward of 300°F, so it's often times important to have an aftercooler in your system. This aftercooler can mount directly to your existing belt guard. The intake and output are both 3/4 Inch Female NPT fittings. This cooler is designed for 5-7 HP motors. The dimensions between the bolt mounts are 17.75 x 8.5 Inches. Please see below for more details and specifications. Features & Specifications: 3/4 Inch Female NPT Fittings Can Mount Directly To Your Existing Belt Guard Dissipates Heat To cool Hot Air For 5-7.5 HP Motors Dimensions Between Bolt Mounts: 17.75 x 8.5 Inches