Justrite EcoPolyBlend Accumulation Centers 25″X25″X5 1/2″Economical, low-profile secondary containment platforms are eco-friendly. Made of black, 100% recycled, post-industrial, durable polyethylene. Yellow version is made from 35% recycled content. Nearly impervious to chemicals, including acids and corrosives. Seamless design ensures any leaks or spills are captured in sump before reaching floor drains or creating a slip hazard. Sturdy grates are nearly 2 1/2 thick for superior crack resistance. Self-locating, they reduce the chance of grate ride-up and remove for easy cleaning. Modular centers offer ability to create a customized system by using optional joining clips to firmly lock units together to expand storage space. Sumps remain separate and clips can be removed for easy repositioning.