DeFelsko PosiTector PRBGLS2060 PosiTector Gloss Meter - Probe Only - Range: Semi Gloss, 60° Value:10 – 70 GU, Measure With: 60°. Compatible with the PosiTector GLS gloss meters, this gloss meter probe is suitable for high-gloss to semi-gloss applications and calculates the haze index. In addition, this probe measures at a 20° and 60° angle.