HD stands for "Heavy Duty"! This extremely durable, black aluminum base for our MAXNOMIC™ chairs is the perfect addition for our larger customers. By adding this base, our office and gaming chairs are loadable up to 330 pounds (150kg)! It fits the standard casters as well as those found in our accessories category. Also fits chairs and others with standard post sockets!
NOTE: When ordering the HD-BASE together with a chair, we substitute it for the original base - for ease of shipping and to prevent damage during shipment. The original base is therefore not included when ordered at the same time as a chair.
NOT FOR XL-SERIES CHAIRS - they already come with a heavy duty base.