Sew Slip 12x18 Slippery Top Surface, Tacky Underside, Maximum Glide While Free Motion Stitching Perfect covering the feed dogs for maximum glide while free motion stitching! A slippery top surface to make your fabric glide with a tacky underside to keep our sheet from moving WITHOUT the use of any adhesives. 12" x 18" size with 1/2" diameter round hole precut. Trim with scissors Clean with clear, running water. Use for fusing projects, painting projects and cooking too. Max use temp 500 degrees F.