HO SCALE 1:87 Single OBB catenary support arm (suitable for poles art. 192 and 193) HO SCALE 1:87 Single arm for OBB catenary support (suitable for poles art.192 and 193) HO MASSSTAB 1:87 Einarm für Oberleitungsstütze ÖBB (passend für Masten Art. 192 and 193).