20 um (ASTM 635) NIST Traceable Sieve Standard 5 bottle set, 0.8g per bottle

20 um (ASTM 635) NIST Traceable Sieve Standard 5 bottle set, 0.8g per bottle     Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL     Measure over 1 million...

25 um (ASTM 500) NIST Traceable Sieve Standard 5 bottle set, 0.8g per bottle.

25 um (ASTM 500) NIST Traceable Sieve Standard 5 bottle set, 0.8g per bottle.       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL     Measure over 1...

32 um (ASTM 450) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle

32 um (ASTM 450) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL     Measure over 1...

36 um 38 um 40 um (ASTM 400) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle

36 um 38 um 40 um (ASTM 400) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL    ...

53 um 56 um (ASTM 270) NIST Traceable Sieve Standard 5 bottle set, .10 gm per bottle

53 um 56 um (ASTM 270) NIST Traceable Sieve Standard 5 bottle set, .10 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL     Measure...

45 um 50 um (ASTM 325) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle

45 um 50 um (ASTM 325) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL     Measure...

63 um (ASTM 230) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle

63 um (ASTM 230) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL     Measure over 1...

71 um 75 um 80 um (ASTM 200) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle

71 um 75 um 80 um (ASTM 200) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL    ...

90 um (ASTM 170) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle

90 um (ASTM 170) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL     Measure over 1...

100 um 106 um 112 um (ASTM 140) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle.

100 um 106 um 112 um (ASTM 140) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle.       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and...

125 um (ASTM 120) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle

125 um (ASTM 120) NIST Traceable Sieve Standard 5 bottle set, 1.0 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL     Measure over 1...

140 um 150 um 160 um (ASTM 100) NIST Traceable Sieve Standard 5 bottle set, 1.5 gm per bottle

140 um 150 um 160 um (ASTM 100) NIST Traceable Sieve Standard 5 bottle set, 1.5 gm per bottle       Unique microsphere method of sieve calibration     Mean aperture sizes traceable to NIST and NPL    ...