This is the 53 long Model. You can remove panel for shorter door versions. This is in Like BRAND NEW Condition. Super Nice & Strong Lockable.The item "PET DOOR for PATIO SLIDING GLASS DOORS Large Doggy Cat Entry Flap Adjustable" is in sale since Tuesday, August 28, 2018. This item is in the category "Pet Supplies\Dog Supplies\Doors & Flaps". The seller is "swampdizzle" and is located in Las Vegas, Nevada. This item can't be shipped, the buyer must pick up the item.