Velux RW04. New equivalent is RK04. For roof pitches 20⁰ to 90⁰. Bought 15 years ago, and never fitted it. Kept in dry, insulated storage loft, therefore, no expansion and contraction of temperature changes, (that cause the sealed glazing unit to lose vacuum and steam up). Part L and F compliant. Central pivot, low profile, escape window. Flashing kit for use with slates/ tiles up to 45mm. Neither the window, nor the flashing kit have ever been taken out of their boxes. Collection, Bakewell, Derbyshire.
eBay