BYK Instruments Model 5357 5-50 Mils - 4'' Path

BYK Specular Gloss Standard tiles

Q-Lab QUV/SE Weathering Tester for Biological & Industrial Laboratory

BYK Gardner Vintage 1990 Specular Gloss Standard tiles No GG-6661 TE-6103 @ C1

BYK Gardner Glossgard II 75º Glossmeter

W.S.TYLER 5357 8" HH-SS-SS-US #6 SIEVE

BYK GARDNER #3 Zahn Viscosity Cup, Stainless Steel, Made In USA SN 31111

BYK GARDNER #3 Zahn Viscosity Cup, Stainless Steel, Made In USA SN 31095