The STS P3 Particulate Respirator Pre-Filter (P3RC) provides protection against airborne particles, dust, mist and fumes when used with compatible STS respirators and gas filter cartridges. Ideal for construction, manufacturing, spray painting, sanding, grinding and industrial applications. Unit of Measure: PAIR Key Features: Certified and fully compliant with Australian/New Zealand Standard AS/NZS 1716:2012.P3 pre-filter clips over STS gas filters to make a combined particulate and gas filterFilters 99.95% of particulates.Mechanical filtration doesn’t lose filtration efficiency as it gets full or wet.Filters are water and oil-repellent.Hard casing protects filter material from damage.Easy to connect, no filter retainers required, they simply clip onto the gas filter.Two required per mask.Dimensions: 86mm (dia) x 14.5mm (H)Weight: 20g Compatible Gas Filters:CA-A1CA-A2CA-AXCA-ABEK1 Compatible Masks:RS01SD – Half MaskRS01 – Half MaskFS01 – Full Face MaskCF01 – Full Face Mask