The DeFelsko PRBGLS206085 PosiTector Gloss Meter - Probe Only - Range: Low / Matte, 60° value:< 10 GU, Measure with: 85° is the Portable gloss measurement for all surface finishes: Certificate of Calibration showing traceability to NRC for both the probe included: Conforms to ASTM C584/D523/D4039, ISO 2813/7668, JIS Z 8741, AS/NZS 1580.602.2