Generation 1
Backbone For iPhone:
Height: 93.9 mm
Width (Contracted): 176.2 mm
Width (Extended): 257.6 mm
Depth: 32.6 mm
Backbone For Android:
Height: 93.9 mm
Width (Contracted): 176.2 mm
Width (Extended): 257.6 mm
Depth: 34.1 mm
Generation 2
Backbone For iPhone 15, iPhone 16 and Android:
No-pad X internal length, bare phone (L tunnel to collar edge): 177.5mm
No pad X internal length, cased phone (L tunnel to base of collar): 179.5mm
No pad Z gap: 14.9mm
Collapsed X length: 176.3mm
Fully extended X length: 265.0mm
No pad X internal length, cased phone (L tunnel to base of collar): 179.5mm
No pad Z gap: 14.9mm
Collapsed X length: 176.3mm
Fully extended X length: 265.0mm