This PetSafe pet flap 640 provides your pet with all the independence to enter the house without your having to open the door. This PetSafe pet flap was formerly known as the Staywell pet flap. The solid aluminium frame has reinforced corners for heavy use. The flexible, soft flap is tinted and adjustable. A magnetic flap closure and pile weather stripping along the sides of the flap opening form a weather-resistant seal. A closing panel is included for improved weather-resistance or to control your pet\'s access to the pet door. Installation is very easy.