Economical Design Sets Up Quickly - Provides Secure ContainmentThe Collapsible Wall Model Containment Berm features ruggedPVC sidewall assemblies for sidewall support. Simply swivel the"feet" of the PVC supports to lower or raise the sidewalls injust seconds!Custom sizes availableMeets SPCC and EPA Container Storage Regulations 40 CFR 264.175. Simply swivel the "feet" of the PVC supports to lower thesidewall. Vehicles and equipment can then roll over the topof the collapsed wall for convenient entry and exit. Rugged design easily contains small and large spills.