supply of half face mask set (udyogi res-protek 8200 or equivalent) for painting/chemical handling , half face mask set (udyogi res-protek 8200 or equivalent) for painting/chemical handling; re usable tpe construction for secure, low-leakage face seal and comfort; adjustable head harness with elastic straps for firm fit during prolonged use; integrated exhalation valve to reduce breathing resistance and hea t build-up; bayonet connection system for secure, quick, leak-proof filter replacement; designed for twin sid e-mounted filters; specifically supplied with 4 nos. 8101 a1 organic vapour (ov) twin filters; type a (ov), c lass a1 filters suitable for organic gases/vapours (boiling point >65?c); activated carbon adsorption with ca pacity up to 1000 ppm (brown colour code); option for combined protection via 811 pre-filter and 810 retai ner; mask conforms to en 140:1998; filters conform to en 14387:2004 + a1:2008; suitable for painting, ch emical processing, solvents, and hydrocarbons; supplier shall submit nabl accredited laboratory test certifi cate. sample to be approved before bulk supply. [ warranty period: 18 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]