Flap ModelLock TypeFlap DimensionsRough Cut OutOutside Frame DimensionsStock NoMfr NoBasic2-Way Lock5 3/4" x 5 3/4"6 9/16" x 6 13/16"7 1/2" x 7 7/8"03PS20CC10-050-11 Petsafe Cat FlapsThe PetSafe Indoor Cat Flap is designed to fit solid core wood doors commonly found in interior homes. The thin flap provides cats with comfortable use and easy adjustment. This cost effective cat door comes with the option of a two-way or four-way locking device. The two-way lock can be completely locked or unlocked, and the four-way lock can be set to in only, out only, as well as locked or unlocked. Not only do inside cat flaps minimize litter odor from reaching unwanted areas of the house, they are great for preventing dogs or kids from getting into the litter box or accessing cat food!