Security Design Colour All our SafeGuard B-Fold doors are fitted with multi point locking hook bolts to any external access door and secure shoot bolt locking to the travelling doors. Where external access is required a 3 Star Diamond rated Ultion cylinder is fitted as standard offering the highest resistance to external attack. These combined with a strong aluminium profile ensures an ultra secure product . All our Bi-Fold doors are custom built to suit a wide range of installations and with standard designs ranging from two through to six doors and from 1.6m - 6m approximately there is a configuration to please everyone. Please ask your installer for advice on the best configuration for you. The white has a robust gloss finish as standard whilst the Anthracite Grey has a unique textured designer finish. More colours are available but require substantially longer lead times. Ask your installer for more details. Our most popular range of standard colours are : WHITE EXTERNALLY AND WHITE INTERNALLY, ANTHRACITE GREY EXTERNALLY & WHITE INTERNALLY, ANTHRACITE GREY EXTERNALLY & ANTHRACITE GREY INTERNALLY.