Extruded aluminum. Slip resistant rubber step area. Molded end caps add unique style. Cradle mounted boards. Product Features:Vehicle Specific Mount Kit Required; Sold SeparatelyCorrosion Resistant Extruded Aluminum BoardSlip Resistant Textured Step SurfaceInjection Molded Polymer End CapsRocker Panel Gap Strip Included For Finished LookOptional Light Kit Available PN[27-6000]