Fast-Trac Air Lite SP Single Backer for Traction Studs - Orange - 24pk 653SPO-24 Lightweight polymer backer Designed for single-ply tracks using Top-Gun SP studs Extended height adds rigidity and eliminates need for a tall nut on studs up to 1.375in. in length Available in black or white in 24, 84 and 96 pieces/package