- Filtering medium composed of fine glass fibres for 65%, 85% and 95% efficiency.
- Separate bags make the filter extremely rigid and ensures the air flows proportionately through each one of the bags.
- Each row of stitching is protected with “HOT-MELT” –type sealant.
- The filtering medium has a protective coat of nylon fibre which makes the bag more resistant.
- The inside of each bag also has rows of stitching to ensure the whole of the filtering medium is used.
- Double stitching round the edge of the bag
- Frame in extremely stain-resistant galvanized steel.