Crosstex™ Surgical Tie-On Mask Crosstex™ Surgical Tie-On Mask GCS ASTM LEVEL 2. Ideal for procedures where moderate to light amounts of fluid, spray and/or aerosols are produced. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.