About this item Built From Durable, Heavy Duty Impact Resistant Thermoplastic Olefin (TPO).Material:Thermoplastic Olefin Precisely formed to fit Contours of door Sills / Rocker Panel Protects Door Sills & Rocker Panels from Scratches and Rock Chips Covers Up Rusted or Dented Rocker Panels / Pinch Welds Installs Easily via Included Double Sided Tape; Comes as a Set of 4 Pieces for Ease of Installation