The Pet One range of Dog and Cat doors make it easy for your pets to come and go as they please. With a wide variety of sizes and styles available, you will be sure to find the perfect door for your pet and your home. Polycarbonate Insulated Dog Door – For Security Screens, Glass & Glass Sliding Doors Designed for security screen doors (mesh and perforated steel) and single-glaze/sliding door applications up to 3-15mm. Sliding door minimum clearance 17mm. Suitable for pre-cut safety glass Robust construction with UV stable 100% polycarbonate opening 2-way manual locking system (In/Out, Locked) to control your pets entry and/or exit 2 additional security latches give added strength to flap locking system Finished with a self closing flap and brush weather seals, this automatically covers the pet’s entry & exit and keeps the draughts out High impact polycarbonate flap – UV stabilized and virtually unbreakable Suitable for: Dog 48939 - Door Dog Poly (S) Screen/Sng Glaze & Sliding Glass Door Fit 9kg 23cm