SSPC-VIS 3 Visual Standard For Power And Hand Tool Cleaned Steel

SSPC Visual Standard 1967 Pictorial Surface Prep for Painting Steel

Buehler Wilson 23 29.69 HRC +/- 1.0 Hardness Standard Test Reference Block

SKF Optical Phase Reference CMSS6155

Vintage 1960s Boonton 22A/62B Precision Resistance Reference & Voltage Standard

NEW INTEL XEB72353 ONLY! from KIT XEK 66700 XFP Reference Design Kit

CROYDON PRECISION INSTRUMENT CO. 0.01 OHM Reference Standard

Eppendorf Reference 2 (Set of 4)