Tender For particulate filtering half face mask with expiratory valve confirming to is 9473:2002 or latest to protect against solid dust particlesmake & model: venus v 410 v/3m 9504 inv/joseph leslico jl-240 v/ka ram rfh01+/magnum dusto guard exhale. the supplier has to submit manufacturers test certificate along with material. the material should be in the original packing of the manufacturer. sample shall be approve d before bulk supply. minimum shelf life of the product at the time of delivery to the consignee shall be 3/4 th of total shelf life [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ]