17 Insulating materials for power, distribution and regulating transformers and related electrical equipment, namely, hot pressed or calendered sheets, shaped, milled or molded into parts, assembled components or packages, all made of cellulose or aramid sheets; electrical insulating materials, namely, hot pressed or calendered sheets, shaped, milled or molded into parts, assembled components or packages, all made of cellulose or aramid fibers; insulating materials for transformers and related electric equipment, namely, crepe paper, and calendered and non-calendered presspaper; electrical insulating materials for power distribution and regulating transformers and related electrical apparatus, namely, pressboard and transformerboard, hot pressed or calendered in sheets and shaped, milled or molded into parts, assembled components or packages, made of cellulose or aramid fibers; electrical insulating materials, namely, insulating paper, laminated insulating paper, insulating presspaper, thermally upgraded insulating paper, thermally upgraded insulating presspaper and insulating pressboard; cellulose based, cotton based, Kraft based and aramid fiber based insulating materials and insulation components, namely, insulating materials in the nature of pre-formed insulation components; electrical insulation materials, namely, parts, assembled components and packages for use in transformers related electrical equipment made of aramid, cellulose, cotton, Kraft; electrical insulating materials, namely, laminated transformerboard made up of sheets of transformerboard bonded together to form a laminate structure