Seamless, knitted filter fabric. Filtration opening size for plush fabric is 250 microns. Filtration opening size for regular knit fabric is 600 microns. Developed specifically for groundwater monitoring and remediation. Vertical and horizontal applications. Open pit and tank installations. Helps prevent well failures. Highly resistant to most chemicals including strong and weak acids and alkalines, organic chemicals, and salt solutions. Widely recommended by environmental professionals. Unequaled durability when compared to non-woven materials. Allows high rate of water or chemical flow while filtering out fine particles.