This Pet-corp Medium 4 way locking Dog Door is ideal for dogs around 50cm shoulder height (no larger than 55cm) at adult size (Beagles,Spaniels etc), it is designed for single or dual-glaze installation, 
Total dog door size including frame is 435mm diameter. 
Flap size is 300mm H x 295mm W. 
Can be fitted to most types of glass on site by our expert fitters 
*NOTE Safety glass and double glazed panels may require replacement ,call msg,or email us , we can advise you on the best solution for you and your pet.