Minimal Maintenance Involved: The OX Filter Cartridges are easy to maintain and takes only a few minutes to make the filtration system operational. Abek 1 Filters: The OX Twin Filter Cartridges can work on a wide range of chemicals including organic vapour, acid gas, sulphur and ammonia. Plastic Polypropylene: The OX Twin Filter Cartridges are manufactured from 100% polypropylene microfibers eliminating extractables and no metal is used in making of the mask. Available In Economical Price: The OX Twin Filter Cartridges provide high flow rates with lower pressure drops for longer life at a very economical price. Easy Disposal and Cleanliness Application: The OX Twin Filter Cartridges incinerate to non-volatile trace ash for easy disposal. The cartridges are available in 1-100 microns to meet a wide range of cleanliness applications., Manufacturer: OX TOOLS