The LG510 Small lifeguard chairs gives your lifeguards added height and a wider base to see even the farthest points on the lake or pool. Each LG510 Lifeguard Chair features a cup holder and an umbrella holder (which measures 1 5/8 in. diameter). The Large Wheel Kit (BCWH563) allows you to easily manuever your Lifeguard accessories to exactly where you need them. This Large Wheel Kits works on our Officials Lifeguard Chair, the LG510 Lifeguard Chair, the MLG 520 & 525 and the TLG 530 & 525 Lifeguard Chairs. Lifeguard-Chairs stand behind everything we sell and guarantee you will be another satisfied customer.