The RAM Mounting Kits that are currently available and tested with Omnii XT10 have a choice of 5-inch or 8-inch arms (approximately 12.5 cm or 20 cm)
MT3324 - RAM mount 5" arm
The RAM Mounting Kits that are currently available and tested with Omnii XT10 have a choice of 5-inch or 8-inch arms (approximately 12.5 cm or 20 cm)
Psion MT3324, 12.7 cm (5")
Psion MT3324. Size (imperial): 12.7 cm (5")