Weatherproof Cat Door 4-Way Locking System for Cats up to 20 Lbs Suitable for Interior Doors Cabinets Garage Doors - 4 Sizes

4 Way Locking
No in& No out( Fully locked)
Free in& Out( Fully open)
In onlly.
out online
Outer Frame Diemension
S: 20*19*2cm / 7.87*7.48*0.79"
M: 20*19*5.5cm / 7.87*7.48*2.17"
L: 25*23.5*5.5cm / 9.84*9.26*2.17"
XL: 28*25*5.5cm / 11.02*9.84*2.17"
Inner Frame Diemension
S: 14*15cm / 5.51*5.9"
M: 15*16cm / 5.9*6.3"
L: 18*19cm / 7.09*7.48"
XL: 20*21cm 7.87*8.27"
NOTE
Size S is a little different from other sizes.It's "thinner"