The Advantech #18 Inch Brass Test Sieve is of impeccable quality. Multiple points of inspection are built into the manufacturing. The measurement system for the wire cloth is traceable to NIST standards and each sieve is labeled for traceability. The die-formed frame assures a proper fit, superior quality and performance, guaranteeing that the American Society for Testing Materials (ASTM) specifications are always met. Serialized to meet the highest grade quality assurance systems for traceability of measurement devices. The serial number is etched on each sieve, and contained in a bar-coded label, tracing vital information such as when sieve was manufactured and which lot of wire cloth was used to manufacture each sieve. Comes with a Certificate of Compliance applicable to ASTM E 11 specifications bearing the serial number of your sieve and the ship date. All safeguards are in place to support and ensure your quality assurance program. US Standard Mesh Size: #18 Inch. Frame Material: Brass. Wire Cloth Material: Stainless Steel. Sieve Height: Full. Sieve Diameter: 8 Inch. Advantech #: 18BS8F.