Ultratech 8227 Copolymer 2000 Ultra-Containment Berm^?, 3590 US gal. Capacity, 12′ W x 40′ L x 12″ H, Hinge Bracket – Each

Easily folds for transport
No set-up required – unfold and the sidewalls automatically spring into their vertical position
Custom sizes available
Vertical sidewall supports located every 12″
Each Support features a built-in “living hinge” at its base, which allows sidewalls to collapse in either direction. Collapsed sidewalls spring back automatically