The PVCu Fold & Slide Door is maintenance free & has the latest technology in energy efficiency Excellent security features including multi point locking system. Slimline 70mm Profile, internally beaded. Low threshold as standard with integral concealed track Low E thermally efficient double glazed glass units with toughened safety glass manufactured to BSEN12150-5 Complies with Part L of the Building Regulations concerning thermal performance. Full concertina effect when all doors are open Detachable vent kit to Part F of the Building Regulations Single access door with chrome handles as standard. Concealed hinges & multi-point locking system All our handing are viewed from the outside & is determined by the side the door is stacked toward, this is particularly relevant on a 10ft as there are hinges on both ends of the door.