Durable, UV-protected EcoPolyBlend™ polyethylene is made of black, 100% recycled material that is nearly impervious to chemical attack from hazardous acids, caustics and solvents. Yellow version is made from 45% recycled content. Seamless construction and oversized, leak-proof sump prevent leaks even if a 55-gal. drum fails and completely empties its contents. Sturdy, self-locating grates are nearly 2 1/2" thick for superior crack resistance and can be removed for quick sump inspection and cleaning. Two- and four-drum square pallets include wide forklift pockets for easy relocation. Square pallet may be equipped with an optional ramp to facilitate loading and unloading of heavy drums. Meets or Exceeds EPA 40 CFR 264.175, NFPA 1 and the International Fire Code, Spill Prevention, Control and Countermeasures (SPCC) Compliant, NFPA 30 9.13.1 and OSHA 29 CFR 1910.106(e)(2)(iii).