Mini SuperHT PAP Pen 2.0 draws a hydrophobic barrier around specimens to retain staining reagents. Barriers are stable at temperatures up to 120°C and resistant to detergent, alcohol, and acetone, but removable with xylene. New REACH-compliant formulation. Mini Super HT PAP Pen 23023: 2.5 mm tip, ~400 applications Super HT PAP Pen 23024: 4 mm tip, ~800 applications