This is a set of Quad Lock's Stem Mount Pro, damper, and adapter. I tried to install it, but the stem shape didn't fit my bike, so I couldn't use it. (It's been opened but is unused.) Stem Mount Pro (Retail Price: 15,400 yen) Damper (Retail Price: 4,290 yen) Adapter (Retail Price: 1,980 yen) Also, as a bonus, I'm including the wireless charging adapter for the iPhone that I was planning to use with it. It's attached with double-sided tape, so you might be able to reuse it if you can remove it carefully. - Brand: Quad Lock - Model: Fork Stem Mount Pro - Accessories: Vibration Damper Thank you for looking.