8mm by 4mm fire door chanel

anyone know who manufactures these doors or who produces intumescent strips at this size?
ta
Steve
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http://www.astroflame.com /
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http://www.basecuritysystems.no-ip.com

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http://www.cfpltd.co.uk/intumstripa.html
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Tel: 01223 832851 Fax: 01223 837215
Brad.
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