athmer oHG, part of the Julius Cronenberg Sophienhammer group, develops and manufactures automatic drop seals and finger-protection systems at Arnsberg-Müschede and describes itself as the leading specialist in the field. Its Schall-Ex drop seals are tested as part of complete doorsets to EN 1634-1 and are released for fire and smoke doorsets CE-marked to EN 16034, with finger-protection products additionally TÜV/GS-tested to EN 16654. The Schall-Ex range is named as an approved component in German fire doorset approvals for timber, steel and glass leaves.