Profile rail, C-profile, slot width 11 mm, with break-off holes. Matching clamps BA... can only be inserted from the end of the profile. You can find these in the KI catalog from Niedax. Dimensions (approx. dimensions) H x W x D: 8 x 20 x 0.75 mm Slot width: 11 mm Profile holes: 4.1 x 6 mm and 6.1 x 8 mm center spacing Grid dimension: 20 mm Break-off holes: 6.1 x 16 mm center spacing Grid dimension: 50 mm Delivery length L: 2000 mm Material: Steel, strip galvanized according to DIN EN 10346