Ideal Pet Products Ruff-Weather Pet Door-Small 3-step Unzip the sides to allow

Unzip the sides to allow the carrier to expand 3"

Waterproof: gives your dog freedom to explore wet environments

An unlimited number of receiver collars can be used with one transmitter: you can keep as many dogs as you wish safely in the same area

the wire must be connected to the transmitter and form a continuous loop from the transmitter and back again

Sizes:Medium: 21-27" 30-55 lbs

Ideal Pet Products Ruff-Weather Pet Door-Small 3-step Unzip the sides to allowThe Ruff Weather Pet Door was designed to handle all types of climate conditions, while boasting great energy efficiency, thanks to this doors double flap feature! Structural foam plastic frame that adapts to doors ranging from 3 4 to 1 3 4 in thickness. Double, flexible clear vinyl flaps create a 3 inch air pocket for maximum insulation and energy efficiency. Optional Ruff Weather Pet Door Wall Kit is designed for installation in walls from 4 3 4 to