VEVOR Concrete Knee Boards Stainless Steel, 28'' x 8'' Concrete Sliders, 2 Pairs Concrete Knee Pads Moving Sliders, with Knee Pads & Board Straps for Cement and Concrete Finishing 28"x8" Concrete Knee Boards Stainless Steel Construction EVA Protective Knee Pads Built-in Toe Brackets Premium Quality & Lightweight Perfect for Concrete Finishing Concrete Board Size: 28"x8"x4" (70x20x10 cm),Product Type: Concrete Slider Knee Board,Number of Pieces: 4,Knee Pad Size: 7.1"x5.9"x3.5" (18x15x9 cm),Material: Stainless Steel & EVA,Application: Concrete Finishing and Screeding,Board Thickness: 0.08" (2 mm),Pad Thickness: 1.2" (3 cm),Item Weight: 40 lbs (18.18 kg)