... 1.Thickness : 3-100mm 2.made from paper that impregnated with phenolic resin 1.Description: 3021C paper based phenolic board is ... With high mechanical strength and electrical properties2.Specifications:1).Thermal grade: class E.2).Thickness : 3-100mm 3).Size: 980 x 1 ... mechanical devices.3021A, 3021B, 3021C (China standard) is in accordance with X, XX, XXX, XP, XXP, XXXP, XPC ( NEMA standard) No. ...