Features:br new high qualityGreat Fit F Do: Flap Only. Features 4 hole at the top of the flap f perfect alignment.Quick Easy Installation: Installs in just minutes with only screwdriver. It is easy, you will be kicking yourself f not replacing that old dogs do soon.High-Quality Material: This flap compatible with Cats Do Dog Do is made from flexible, durable, weather resistant TPU-materials.Weather Tight and Weather Resistant: Magnetic strip at bottom of flap securely connects flap the magnetic interfaces at the bottom of your cats do / dog do to keep outside weather from blowing inside.Compatible With Many Do: 2 Size of Replacement Flap to choose. Medium is about 32.2x20.5cm; Large is about 43x26cm. Specifications:Material: TPU-MaterialCol: As Pictures ShowSize (Approx.): M-32.2x20.5cmL-43x26cm/16.93x10.24inWeight (Approx.): M-225gL-430g Note:1.Please allow 0-1cm err due to manual measurement. pls make sure you do not mind befe you bid.2.Due to the difference between different monits, the picture may not reflect the actual col of the item. Thanks Package includes:1 Piece Dog Do Flap Replacement (Medium/Large)