Saf Filter Pvt. Ltd. Offers Filter Bag Cages and Venturi. Saf Filter Pvt. Ltd. Is the supplier of filter bags and air slide fabrics. Air Side Belt Fabric is used in pneumatic conveyor lines. Filter Bag Cages and Venturi is used for varied industrial applications. Filter Bag Cages and Venturi are made of GI/MS/SS in various wire diameter using automatic cage welding machines. These Filter Bag Cages are used in most bag houses as these are designed to serve as critical bag house components for optimum bag performance and durability.