Special Design for GIANT PCR LTD Road bike stem for GARMIN Compatible with GARMIN Edge 1000 800 820 520 IGPSPORT ( SAME AS GARMIN ) or WAHOO elemnt bolt mini or bryton computer GPS Material: Alloy ,CNC machined ,with steel bolts Include : 1pcs computer mount Bolts size: M5x70mm, shim 40mm Weight:55g Color: anodized black color