17/14 mesh means there are 17 holes in one direction and 14 holes in the other direction in every square inch of screen. This mesh size offers the clearest viewing when sitting on a porch or balcony and looking out at the landscape, while still protecting you from flies, mosquitos and other small insects. 17/14 mesh blocks out 30% of the harmful UV rays and lets the good rays in that lets your plants flourish.
17/14 MESH SIZE
Pool & Patio Screen
17/20 mesh has 17 holes in one direction and 20 holes in the other direction for every square inch of screen. The openings are a little smaller so it keeps out some of the smaller insects. Yet it allows you to view your landscape with little to no distortion. 17/20 mesh blocks out 50% of the harmful UV rays and still lets in the good rays to help your plants grow.
17/20 MESH SIZE
Tiny Insect Screen