... 3. standard color: Brown .orange,black4. Applications: It is used for the insulating spare parts of electrical appliances and transformers, high ... , XXX, XP, XXP, XXXP, XPC ( NEMA standard) No. ITEMUNITVALUE3021C paper based phenolic board1Densityg/cm31.30~1.502Heat resistance Thickness ≤20mm °C ... oil 5 min at 20±5°C ≥kV108Temperature index°C120 Equipment warehouse 3021C paper based phenolic board