The cuneiform bellows are in spruce, the folds are upholstered with paper, the hinges are reinforced with linen canvas, the bellows
are covered inside and out with sheepskin. The main hinge is reinforced by ropes holding the bellows table onto the frame.
Normally our bellows are placed vertically in the substructures; however, for the baroque instruments we can also furnish the bellows horizontal to the chassis.
The wind conductors are solid wood. The air ducts are custom made soldered tin tubes.