The Ultimate series Rock Door Stable Spy View doors provide high security and offer top thermally efficiency – using S-Glaze technology to integrate A to A++ energy rated glass within these doors, carbon fibre reinforcement for added strength and insulation, and a multilocking system for each of the two sections. These Stable Spy View Box Lead Rock Doors are also made to measure, and come in a selection of easy-to-clean woodgrain and opaque colour finishes.