Total 10 fixing holes (M6 x 6, M5 x 4) on its base provide broad compatibility with major brands' housings/grips, and attached thoroughly by two cap bolts.
■Full length: 88mm (3.5in)
■Effective length: 76mm (3.0in)
■Weight: 46g (1.6oz) [air] / approx.28g (1.0oz) [underwater]
■Package contents: M6 Cap Bolt x 2, M5 Cap Bolt x 2,
M6 Flat Washer x 2, M5 Flat Washer x 2, Allen Wrench
■Compatible base/housing etc.