The name says it all, but I can talk a bit more about it.
Seriously, it is that simple yet efficient, durable....O.K. Maybe its not so simple. Here is what we are saying. This dog door uses a free swing hinge that makes pet accessibility easy and safe. This gives even the most timid of pets a chance to use the dog door. Unlike its other free swinging competitors, this door has the least amount of air infiltration on the market meaning the less air that seeps out of your home, the less money you lose to heating bills! This flap is made out of Plexiglas which allows it to be sturdy, shatter proof, and chew proof. The frame is aluminum so that you need not worry about it getting damaged. So for a simple pet door thats....not, take a look at our Easy Pet Door

Dimensions
Dimensions	Easy Dog Door	Easy "Big" Dog Door
Opening	11.5"W x 15"H	16.5" x 25.5"
Frame Dimensions	14"W x 17.5"H	18" x 26"

Product Features:

• Weather proof - provides weather tight seal that resists heavy winds or rain.
• Chew proof - from small puppies to full grown labs.
• Energy efficient - save money each month and conserve your homes energy.

Trim Kit: Includes primed wood inserts that are designed to easily cover the raw metal edges on the door for a professional hardwood finish.

Sample Images of Drop-in Closing Panel