High-quality plywood material offers strength and longevity. Features two 'L' brackets, along with the subwoofer's safety pin, to attach the subwoofer to the base securely. With a 660 lbs weight capacity, it offers reliable support for your Sound Town ZETHUS-118S/118SPW subwoofers and provides convenient mobility for furniture. Effortless transport is possible even when stacked with four ZETHUS-210B/ZETHUS-210BPW full range speakers. Four rolling wheels, two of them equipped 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.