We are offering vertical laminar air flow. direction of flow: top side filter fittedcleanliness: class 100velocity: 90 fpm + -20%hepa filter: size and qty. Will depend on the size selectedparticle retention: above 0. 3 micronblower assembly: 1 3 hp, 1440 rpmnoise level: 65 decibel + -5%rate of air flow: 0. 40 to 0. 75 m sec. (90 fpm)vibration level: < 2. 5 micronair velocity: between 0.4 to 0.5 ms with +- 20%hepa efficiency; 99.997 % at 0.3 microns with dop testpre filter washable with a stoppage: up to 90 % at 5 micronssound level: less than 65 db (a)light intensity (lux) :900 - 1300 luxcleanliness: us federal standard 209 eclass 100power supply: 220240 v single ph, 50 hz ac.optional : s. S table top. u. V lights attachment front acrylic door gas vacuum cock castor wheels at the bottom.