What we love about this door mat: frames any Sassafras insert beautiful Rubber backing holds firmly in place Diamond shape drainage holes ensure longevity for the inserts Collect a variety of inserts (sold separately) for easy seasonal updates! Size: 18" x 30" What it is made of: Rubber Our take on this door mat: Frame any Sassafras mat in this beautiful scrollwork tray for an extra touch of personality. Crafted from stain-resistant polyethylene with a rubber backing to hold it in place, the tray provides a study base for any Sassafras mat. With a stunning pattern, this tray features beautiful scroll fleur di lis details that serve as drainage holes. This design can only be used with Sassafras mats, sold separately.