Cowhide, black, thickness 1.2–1.3 mm. Sheet size approx. 2.0 m² per piece, for feeder bellows and connecting pieces.
Gasometer goatskin, grey, thickness ~1.0 mm, one side sanded, the other split. Sheet size approx. ~0.6–0.7 m².
Gasometer goatskin, grey, thickness ~1.2 mm, one side sanded, the other split. Sheet size approx. ~0.7–0.8 m².
Cowhide, white, with artificial grain, thickness 1.2–1.3 mm. Carefully made by hand in POM's workshop in Pécs. Sheet size approx. 2.0 m² per piece.