Supplier Page from Thermo Fisher Scientific for Graphite fusion crucible lid for stock number 40794, 2.54cm (1.0in) dia, 6.35mm (0.25in) thick
USA Standard Sieve, 12 Mesh from Thermo Fisher Scientific
USA Standard Sieve, 325 Mesh from Thermo Fisher Scientific
USA Standard Sieve, 635 Mesh from Thermo Fisher Scientific
USA Standard Sieve, 850 Mesh from Thermo Fisher Scientific