If your gas cylinder has worn out on your chair or stool, consider this heavy-duty option. This replacement office chair gas lift cylinder is heavier than standard chair gas lift cylinders. It's a great replacement option for damaged or worn-out gas lifts on office chairs, task chairs, executive chairs, and more! While this gas cylinder will fit most chairs and stools, it will not fit all. Please measure your original cylinder to be sure. Minimal dimensional differences shouldn't alter the performance of the lift when installed. Always remove gas cylinders with care, and never heat or puncture them.