Made of aluminum + iron. Each weighs 40 grams. These long legs are forged from aviation iron + aluminum, are hard anodized, have a long lasting luster, and have a 60 degree taper seat and opening design. Each weighs just 75 grams, you get fashion and style while reducing unsprung weight and spin quality. . The slim design eliminates the need for slotted drive nuts. One threaded tip per ear / easy to replace.