The product portfolio of accessories for ventilation and airduct systems is very wide. For mounting of flexible ducts one use clamps, clamps on roll and nylon strips. Circular ductwork is mounted with duct suspension clamps, threated rods or perforated strips. Rectangular ducts are mounted on mounting rails with sliding nuts. To make the ductwork airtight one uses aluminimtapes, gasket tapes or sealants. To make the inside of air ducts accessable, access doors are used. Very strong mountain frames are used to install airco units .