High-quality plywood material offers strength and longevity. Supports a maximum weight of 660 lbs, ensuring safe transport of your Sound Town ZETHUS-218S/218SPW subwoofers and also makes it an excellent option for moving furniture with ease. 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. Two handle openings on the caster board for easy carrying and transportation.