10in Polyester or Nylon Cloth Squares are specially designed to fit non-metallic or brass two-part frames Each square has a resilient material embedded in the mesh in a circular shape, acting as a sealing gasket. Opening sizes are equivalent to ASTM E11 sizes, but do not meet tolerance requirements. Polyester and Nylon mesh sizes No. 100-No. 230 (150-63µm) do not require circular resilient material.
Polyester is recommended for most applications because it resists abrasion, acids and most alkalis up to a pH of 9-10 while maintaining very strong wet stability. Nylon has excellent abrasion resistance, high tensile strength and resists higher pH levels but tends to stretch in water.