Designed to integrate efficiently with specific roofing materials. An efficient way to ensure a watertight installation for windows. One-piece bottom apron design improves aesthetic finish and allows for easy installation. 10 Year Manufacturers Guarantee (Registration Required, T&Cs Apply) Watertight Ensures Waterproof Installation Easy to Install Roof Pitch: 20-90° Max. Material Profile: 45mm Specifically Designed for Keylite Roof Windows 10 Year Manufacturers Guarantee (Registration Required, T&Cs Apply) Watertight Ensures Waterproof Installation Easy to Install Roof Pitch: 20-90° Max. Material Profile: 45mm Specifically Designed for Keylite Roof Windows