MSB6-1/2-FRC5:J1M1 G 1/2 FRL, Manual Drain, 40μm Filtration Size. This filter regulator and lubricator from Festo brings high levels of safety and efficiency to compressed-air preparation applications. It features built-in pressure and flow sensors for the continuous and reliable supply of compressed air. A stable exhaust function improves safety in your system, as does a built-in soft-start control that ensures a gradual start-up of air pressure.