1/4" NPT Mini precision lubricator is a visible drip type lubricator with an external adjustment screw. Unit is designed for low air flow applications where space is limited. Bypass system allows full air flow with minimum pressure drop and assures proper air/water mixture over full operating range. Requires approximately 1 SCFM of air flow to deliver oil. Includes polycarbonate bowl and two 1/8" NPT gauge ports.