Built with reliable plywood for long-lasting performance. Features two 'L' brackets, along with the subwoofer's safety pin, ensuring secure attachment of the subwoofer to the caster board during transport. With a 660 lbs weight capacity, it offers reliable support for your Sound Town FILA-118S subwoofers and provides convenient mobility for furniture. Effortless transport is possible even when stacked with four FILA-208 full range speakers. Equipped with four rolling wheels, including two with locking brakes, for easy mobility and secure positioning. Two slotted designs for better subwoofer adaptation. Provides convenient mobility for your subwoofers during gigs or events.