What's in the box:

Bike Computer Mount Bicycle Handlebar Holder Extended Out Front Mount Replacement for Garmin Edge (Standard)

Features:
Hardness plastic material,durable to use.
Replacement for Garmin bike computers(not included).
Easily set in front of your stem with hardware.
Come with 2 rubber gaskets to fit most handlebar size: 22.2-31.8mm/0.9-1.3in.

Specification:
Mateial: Plastic + Rubber + Stainless steel
Package weight: Approx. 60 g / 2.1 oz

Package List:
1* Bike Computer Mount Holder
1* 25.4mm Gasket
1* 35.4mm Gasket
1* Wrench