These sliding lids are Original Equipment Manufacturer (OEM) products intended for use with the Flowermate V5.0S. The sliding lids are an integral part of the Flowermate V5 design and allow the mouthpiece storage and heating chamber to be easily accessed. They are exactly the same as the sliding lids that originally come with the purchase of the Flowermate units. Made by Flowermate, you can rest assured they will fit your vaporizer perfectly.