The Original 700 Series Features: Magnetic Weather Tight Seal To Help Prevent Energy Loss Interior Lockable Security Barrier Rigid Plastic See-Through Flap Style And Security For Virtually Any Application Available In A Gleaming White Finish With Rigid Plastic See-Through Flaps Installation Requires Only Common Household Tools Low Maintenance, High Value Includes A 3-Year Warranty From Staywell Small Overall Size 9-1/4" x 7-3/4" Cut Out Size 7-1/8" x 6-1/8" Maximum Shoulder Width 5-1/2" Good for Cats, Miniature Poodle, Yorkshire Terrier Medium Overall Size 13-7/8" x 11-1/2" Cut Out Size 10-3/8" x 9" Maximum Shoulder Width 8-5/8" Good for Beagles, most Terriers, Springer Spaniel, Corgi Large Overall Size 18-3/8" x 15-3/8" Cut Out Size 14" x 12" Maximum Shoulder Width 11-3/8" Good for Dalmatians, Border Collie, Boxer, Setters Usually leaves our warehouse in 1 - 3 business days.