Electronic box with 4 screw domes. Material: PS, flame retardant 650°C. According to 0606 Part 1 / DIN IEC 695 Part 2-1. Entries: 11 x M20, 6 x M25. The tube automatically snaps into place on the inner edge of the tunnel socket and does not protrude into the interior of the box. Rated voltage: 400 V.