Qinglong Insulation Adhesive Tape Co.,LTD is a professional factory of electrical insulation tape.especially in glass cloth tape area. our main glass cloth tape J-231 is equal to 3M 27#; J-233 is equal to 3M 79#; J-236 is equal to 3M 69#. but have a more competitive price,so it will be a best choice to choose our tape for instead. other electrical insulation tape we produce include: acetate cloth tape; polyimide film tape; polyester film tape; Our company are ISO9001 & ISO14001 registered,our products are awarded SGS Enviroment Examination & UL Authentication