Came off a Simmons SD7PK drum set. This adjustable boom stand rod hardware hi-hat mount arm is a must-have for electronic drum players. It is designed for Simmons drums and measures 22 inches by 7 inches. The mount arm is made for easy setup and use, and it is perfect for holding hi-hats in place while you play. The mount arm is made with top-quality materials to ensure its durability and longevity. With its strong and sturdy build, you can rely on this mount arm to keep your hi-hat in place during even your most energetic performances. It is an essential piece of hardware for any electronic drum player, and it is sure to enhance your playing experience.