No-See-Um Small Insect Screen 20 x 20 Screen Mesh Roll - 60 inch x 100 feet - Tiny Mesh Screen Roll for Window, Door, or Patio Screening and Replacement, Charcoal - - Amazon.com
Rubber Fab 2 1/2 in. Tuf-Steel Screen Gaskets - 60 Mesh - John M. Ellsworth Co. Inc.
Atlas Screen Supply Company - Aluminum Frame 20 x 24 w/ 60 White Mesh #AF2024060W
Low Pressure Red Alert Filter, 20 gpm, 60 Mesh Element, 3/4 NPT | Spray Equipment & Service Center