These versatile dog doors are suitable for all glass fitting applications and will fit hole size 245 - 267mm diameter. They are designed to fit into single glazing or double glazing and the slim Profile make it the perfect solution for sliding glass doors (ranch slider or patio doors). This door comes with additional metal security pins for added Protection. Made from high impact polycarbonate, the flaps are virtually unbreakable and seal against draughts using a silicon coated brush weather seal. Available in both white and transparent, both models blend in nicely with coloured surrounding joinery.