High end stackable Chair (set of 4)

A set of 4 strong chairs made of metal and high-end plastic. These have an ergonomic design and are very well made, easily lasting for years. They can be used in a commercial setting or at home. Since they are stackable, they take up little space and can handle over 400 lbs. They're great for a dining table or as extra seating. New ones sell for over $150. They need a bit of dusting and cleaning as they've been in storage. Asking $10 each.