The center bar, the lift cylinder, is metal and the heaviest part of the chairs. Most of the pieces are plastic. I was disappointed at first because the chairs are lightweight. The chairs can be moved easily with one hand because the base is also light. However, I have been using the chairs regularly because they are in my kitchen, and being lightweight is an advantage because I can move them around quickly.
I am small, but my husband is about 190 lbs. The chairs are holding well. The footrest is metal and sits sturdy on the cylinder. The backrest is plastic and a little flexible; it can sway with the body's movement. I am happy with the chairs; the sit itself is comfortable, the mechanism for the lift works perfectly, and the style is pretty. I can lower the chairs down and fit them under the counter.
Light
The center bar, the lift cylinder, is metal and the heaviest part of the chairs. Most of the pieces are plastic. I was disappointed at first because the chairs are lightweight. The chairs can be moved easily with one hand because the base is also light. However, I have been using the chairs regularly because they are in my kitchen, and being lightweight is an advantage because I can move them around quickly. I am small, but my husband is about 190 lbs. The chairs are holding well. The footrest is metal and sits sturdy on the cylinder. The backrest is plastic and a little flexible; it can sway with the body's movement. I am happy with the chairs; the sit itself is comfortable, the mechanism for the lift works perfectly, and the style is pretty. I can lower the chairs down and fit them under the counter.