MaxMate Made In USA Works With 07-13 GMC Sierra Extended Cab 4PC Stainless Steel Chrome Window Sill Trim Overlay This Window Sill Trim Is installed on your factory window Sill. It Is the Straight Window Bottom Line Overylay with "L" Shape Bi-Section Premium Quality 304 Stainless Steel 24 Gauges (0.025 inches) Thickness with Mirror Polish Surface Full 3M Tape (0.025 inches) On The Back For Easy Installation Made in USA with Life Time Warranty The Trim Can't Be Re-applied Afer Your Initial Installation. Please Test Fitting Before Peel Off The Tape.