Quik Stik®+ Oily Surface Mini Solid Paint Marker, 5 16 in dia Medium Bullet, White no checkout machinery and do it yourself jobs machinery and do it yourself jobs allows mask to hang down around the user's neck when not in use Ventex® valve lets the hot air out faster so workers breathe easier and stay cooler R95 protection against both oil and non oil based particulate aerosols Added carbon layer helps filter out nuisance levels of ozone organic vapors Soft foam nose cushion for added comfort and no pressure points or rough Solid paint marker easily advances for paint on demand Airtight permanent marks Marks on virtually any surface oily