WEARWELL 24/Seven™ Anti-Fatigue Mats with Drainage Tiles interlock for quick installation and easy replacement. Place in any wet, dry, or greasy area. Grease-resistant rubber construction. 5/8" thick interlocking tiles. Exceptionally resilient mat offers the perfect blend of rebound and stability for maximum anti-fatigue support. Knobbed underside keeps mat in place. Grease-resistant. Includes molded interlocking T-tabs and T-slots for easy installation. For every 3x3' section, there are two female and two male edges. Color: black.