WDE002027 is a Schneider Electric Exxact impulse spring. Being made of steel material, this impulse spring is very reliable and resistant. This impulse spring is also certified as a green premium product. And it is mercury free. This impulse spring is SVHC (substances of very high concern) free too. It obtained CE, FIMKO, NEMKO, SEMKO certificate as well. What's more, it well satisfied the standards of EN 60669-1. Exxact is a wiring range developed from Nordic installation habits. As integrated solutions for energy and comfort controls, there are more than 250 functions and inserts to choose from.