MTN515990 is a Schneider Electric Merten inserts sealing ring. This sealing ring is used for augmenting the level of protection to IP 44. It is compatible with Merten System Design products. What's more, this device is qualified as a green premium product, with minimal use of hazardous substances. This sealing ring is mercury free. Merten System Design is a varied switch series that makes a statement with a variety of switch designs. It embodies aristocratic elegance and luxurious exclusivity.