Ergomat Basic Smooth Matting 5% nitrogen solution of high purity 5% nitrogen solution of high purity urea in deionized water) is a key component of selective catalytic reduction (SCR) systems which help diesel vehicles meet stringent emission regulations effective January 1 2010 The Complete Smooth is a versatile polyurethane anti fatigue mat that can tolerate mild exposure to oils and other liquids and delivers exceptional value in industrial settings where pivoting workers and cart or trolley accessibility must be accommodated Ergomat Basic Smooth is a light duty anti fatigue mat that will perform well in non demanding applications like retail counters assembly or other inappropriate and unsupported industrial uses is not recommended and will void warranty protection