Low profile EcoPolyBlend™ accumulation centers only measure 5-1/2 in high for easy handling of drums. Made of recycled polyethylene, these accumulation centers are nearly impervious to chemicals, including acids and corrosives. Seamless construction eliminates leaks, making these ideal for drum filling and dispensing operations. Self-locating grates won't ride up and are removable for easy cleaning. Combine 2, 4, 6 and 8 drum modular units to create your own customized system. Use the optional joining clips to firmly lock units together. Sumps remain separate and clips can be removed for easy repositioning. Dirt hiding black accumulation centers are made from 100% recycled polyethylene high visibility yellow accumulation centers contain 30% recycled polyethylene. Use optional Sump-to Sump™ drain kit (includes joining clips and transfer tube) for applications requiring a continuous sump. Kit allows you to join centers together, on-site, for full compliance with EPA regulations when sump capacities reach 66 gal. Kit includes one pair stainless steel joining clips, one pair rubber grommets, one polytetrafluoroethylene (PTFE) transfer tube. Safe allowable uniform distributed load of 1250 lb based on a service temperature range of -30 to 120 °F. Justrite® Accumulation Center, Series: EcoPolyBlend™, 4 Drums, 5-1/2 in Height, 49 in Length, 49 in Width, 49 gal Spill, 5000 lb Load, 100% Recycled Polyethylene, Black