A sister product to the #550 Cushion-Ease , this version also features a resilient rubber compound and unique support design to provide exceptional fatigue relief. Can be locked together on-site with #550. Easy to snap together mats on-site for custom work station platforms Optional nitrile rubber borders available for trip-resistant platform. Available in 2 versions: (1) Black mat which is grease resistant and carries a 1-year warranty. (2) Red mat with extra nitrile content is grease-proof and carries a 3-year warranty. Overall thickness is 3/4 inch.