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59980-72SIEVE NO 270 W/NIST TRACE CERT
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59980-71SIEVE NO 230 W/NIST TRACE CERT
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59980-70SIEVE NO 200 W/NIST TRACE CERT
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59980-69SIEVE NO 170 W/NIST TRACE CERT
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59980-68SIEVE NO 140 W/NIST TRACE CERT
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59980-67SIEVE NO 120 W/NIST TRACE CERT
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59980-66SIEVE NO 100 W/NIST TRACE CERT
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59980-65SIEVE NO. 80 W/NIST TRACE CERT
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59980-64SIEVE NO. 70 W/NIST TRACE CERT
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59980-63SIEVE NO. 60 W/NIST TRACE CERT
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59980-62SIEVE NO. 50 W/NIST TRACE CERT
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59980-61SIEVE NO. 45 W/NIST TRACE CERT