thunder grip outdoor stair treads non slip 30" x 8" - 15-pack weather resistant exterior grip tape for wooden steps - non slip stair treads - anti skid strips - waterproof 80-grit adhesive treads black 8" x 30" x 15p is up for auction in Tools & Home Improvement. The current bid is $1.50, 97% below the $44.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.