uPVC Single doors, inc Double glazed glazing, Handle, Cill and Locking mechanism. PVC residential doors, manufactured to the highest standards. Using high security, three hook, locking mechanism. Strong, durable and easy to maintain. Specification. Toughened Safety glazing included. OA product U Value 1.4W/mK. Background trickle ventilation. High Security locking system. Single handle. uPVC Cill included (cill is included in the OA product height). Product viewed from the outside. 10 Year Product Warranty. Product is delivered by single person to kerbside only, w/c delivery slot and on day live tracking are sent via email. Crystal Direct Crystal uPVC Single Door Half Glass Half panel Right hand Obscure in White Size: 890mm x 2090mm