Sieve Brass Usa#20 850um 2in ,Each

Details:

Sieves, brass wire and frame^ full height. Usa series mesh size: #20. Sieve opening: 850um. Diameter: 20.3Cm. Marked with us sieve number, and the opening in inches and microns. Serialized and supplied with "test sieve certificate." Conforms to astm e-11 specifications.