15mm toughened laminated comprised of 6mm low iron toughened/3mm SentryGlas® interlayer/6mm low iron toughened. 

Main plate 17.5mm - the door panel is 17.5 low iron tough clear sentry interlayer 

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"Good morning Gary, Writing to say a big thank you to you and your guys for sorting the glazing out. It really is significantly better. So good, in-fact, customers were again bumping their faces on it during the flower market on Sunday when looking in. The clarity is night and day - even when compared with the door glazing which we felt was markedly better than previous window panel. Best Regards Edward"