This Staywell 917 Pet Door has a 4 Way Locking System & Tunnel to give you greater control over your pets movements both in & out of your home. Measurements:- Overall
Size: 224mm x 224mm (8 1/8" x 8 1/8") Cut out size wood: 169mm x 169mm (6 5/8" x 6 5/8") Cut out size Glass: 210mm (8 1/4") Diameter With a 60mm (2 1/4") tunnel. Pet Max shoulder
Width: 162mm (6 3/8") Locking System
Features:- In Only Out Only Locked Open