Sheffield Measurement Precision Reference Specimens for Profilometer

General electric standard roughness specimens 8651831G2

Sheffield Measurements Profilometer Plus Roughness Profiling System

Rare Vintage GE Standard Roughness Specimens (Cat. 8651831G2)

Vintage General Electric Standard Roughness Specimens #8651831G1

Rubert & Co Cylindrical Turning Scale No. 120 Roughness Specimens Comparator

SPI Microsurf 326 Linishing 0.2-6.3RA Nickel surface Comparator 6 specimens

Moore & Wright 492 PRO Imperial Feeler Gauge 15 Blades Sheffield England 1.5 25