36" Plastic Liners are made in the USA and an economical way to line your indoor and outdoor planters and window boxes. These liners are made of a durable polypropylene material that will last along time in wet environments. These planter liners come with no holes in the bottom so they can be used for indoor planters, but they are also pre-scribed so holes can be easily punched for outdoor drainage. They are not available in custom lengths.