Superior Manufacturing NoTrax MD Ramp System? 3/4" Black Female Anti-Fatigue Floor Ramp measuring 3' features 100% sturdy nitrile rubber construction to equip the locking system. Floor mat can be used to customize configurations on site. It is beveled/molded with mitered corners and a protruding tab for locking two adjoining ramps for a secure corner. Square edges can be obtained by trimming off the miter using the cut line on the bottom of the ramp.