Suitable for the passage of cables and conduits in the building sector of electrical switchboards, installation and machine industry. The construction is based on a metallic sheet with recovering in EPDM. Also suitable in other colors on demand. 6-10 mm => 2 piece, 7-12 mm => 14 piece, 10-14 mm => 16 piece, 12-18 mm => 2 piece, 17-32 mm=> 1 piece. Incl. 4 fixation rivets.