Connections: 3 Inch NPT Pressure Range: 2-7 PSI, Pressure Flow: 62-565 CFM Vacuum Range: 2-14 Inches Hg, Vacuum Flow: 69-580 CFM Shaft mount: Left hand side of blower Eurus ZZ4LDSL PD Blower;Dual Splash Lubrication on both gear and drive ends; Compatible replacement for Roots URAI 47, Sutorbilt Legend 4L DSL, and Tuthill Competitor Plus 4007 models. ZZ Series Features: Precision machined and balanced two lobe rotor. Keyless locking assemblies for gear mounting. Ground alloy steel shaft. Oversized Bearings. Forged alloy steel spur gears. Oil lubricated gear side and grease lubricated drive side.