Polymer-coated foam support blocks (6 lengths) provide structure to sidewalls - can be driven over repeatedly without damage

All of the flanges are made of type-304 stainless steel plates that are 1/8 of an inch thick

18 Gauge Stainless Steel 54' x 22' x 10

while the ring is welded to the other

UltraTech Containment Berm, Stake Wall Model: 6' X 6' X 1' - Copolymer 2000, 28 Oz. - 8209 Diameter-1.31" Polymer-coated foam support blocks (6Portable Secondary Containment For Drums, Tanks, Equipment And Vehicles. Stake Wall Model Containment Berms feature a unique design that allows the sidewalls to collapse in either direction and spring back automatically to their upright position. Roll drums over the sidewalls, drive trucks through them, and the sidewalls always return to vertical without assistance. Does not rely on inflation, hinged straps or cumbersome frames to keep sidewalls up.