RAM Part RAM-B-149Z-UN7 : Heavy duty metal mount coupled with RAM's X-Grip cradle.  These fit handlebars up to 1.25 inch diameter.  This includes the RAM-B-231ZU base, metal arm and RAM-HOL-UN7BU X-Grip Cradle.

Holder Dimensions:
Minimum Width = 0.875"
(Devices at 0.875" must be a minimum of 4" in height to fit into holder)
Maximum Width = 3.25"
Depth = 0.875"

Compatible Cases/Skins/Bumpers:
Artwizz
Ballistic
Belkin
BodyGlove
Case-Mate
DragonFly
Ed Hardy
FishBone
G-Mate
Griffin
iFrogz
iLuv
InCase
Incipio
Inspiretech
iSkin
Ivyskin
Krusell
Luxmo
Mobo
Monaco
Oakley
Otterbox
Seidio
SolidColors
Speck
SwitchEasy
Talon Cases
TPhone
Trident
TurtleBack