A deluxe door featuring a clear flap with four locking positions - fully locked, unlocked both ways, locked in or locked out. Suitable for windows, walls and thin panel doors. Can be used with a tunnel extension for thicker doors (not included and available in white only). Overall size (H)22.4, (W)22.4, (D)4cm. Door size (H)16.9, (W)16.9cm. Manufacturer's 3 year guarantee.