Power: Compatible with 2 hp or 3 hp motors. Performance: Delivers 7.9 CFM at a maximum pressure of 135 PSI (when used with a 3 hp motor). Design: Two-cylinder configuration with stainless steel reed valves. Lubrication: Requires approximately 8.5 oz of compressor oil. Flywheel: Typically 10 inches in diameter with an “A” section groove. Mounting Pattern: 6-9/16″ W x 5-7/8″ D.