The MK 7939S is a Single Module RCBO that is created to fit the Sentry product range. It is a solid neutral single pole 1-module circuit protection/breaker.\r\nThis unit is finished with the standard white color with blue and white colored wires. Safety comes in the form of high-grade thermoset materials that were used to create this RCBO, which has inherent anti-microbial properties.\r\nThe MK Single Module Type B RCBO is a secure circuit protection/breaker fitted to for the Sentry Range and has high impact protection.