Respond to these showcases www. ajplus. co. uk/ajdirect Readers may obtain information about these products by filling in the enquiry numbers on an AJ enquiry card. Advertisers wishing to promote their products on these pages should Tests carried out by the Building Research Establishment (BRE) on Kawneer's AA600 series of aluminium windows have confirmed that they meet the requirements of BS7950. Two types of security testing were used - manual and mechanical.