while the ring is welded to the other

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

lightweight design

Bradley 269-1501 "Service Only"/Seat Replacement Part

Bradley S45-1969 Pre-Pack- Bir Mft W

UltraTech Containment Berm, Stake Wall Model: 6' X 6' X 1' - Copolymer 2000, 28 Oz. - 8209 Diameter-1.31" while the ring is weldedPortable 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.