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Cottrell Paper Company has manufactured electrical insulation including specialty cellulose and rag papers since 1926. Our thermally-upgraded CK125-TU insulating papers are produced using an extensible paper process that provides approxiamtely 20% MD elongation making them an ideal choice for CTC or high profile rectangular wire applications. CK125-TU meets IEEE standard C57.100-2011 and is available in thicknesses ranging from 0.05mm to 0.15mm in master rolls or slit pads. Materials, Insulators/Insulating Material, Insulators, Transformers/Transformer Components