BYK-Gardner SC-4510 Gloss Meter, High Gloss, 20° from Cole-Parmer
Byk Micro Glossmeter 60 Degree 4561 New -Single Angle Gloss Meter for Specific Applications/Semi Gloss, Measuring Area 0.350.6 in: Amazon.com: Tools & Home Improvement
How to Set Up Your BYK-Gardner micro-gloss Glossmeter - YouTube