3M Prefilter TR-3600, for Versaflo TR-300 PAPR 100 EA/CaseGeneral Information Brand Versaflo Cartridge Or Filter Type Particulate Hazard Type Silica Product Series TR 300 Product Type Filter Protection Type Particulate Country Of Origin Canada Sold As Bag Lead Time 2 days California Residents Proposition 65 Warning Dimensions and Specifications Volume 43. 52 cubic inch 713. 23 cm3 Weight 1. 53 oz 43. 45 g Usage Information Compatible Respirator TR 300 Series Color and Appearance NIOSH Cartridge Or Filter