5400 Series Low Maintenance Full Facepiece Respirators, Medium Large ORS NASCO non clogging spray tip is compatible non clogging spray tip is compatible with most striping machines Conforms with US Bureau of Public Roads colors to form your own burning guides Blocks are machined from aluminum and have grooves on three sides Included are set screws to easily adjust blocks on straight edges or squares Options available for one On Off magnetic block (MSB201) or two On Off magnetic blocks (MSB202) fit and performance Lightweight design offers a level of comfort that ensures greater worker acceptance Provides comfort and protection Soft and pliable elastomer material with high chemical resistance to assure excellent comfort