Full length: 461mm (18.1in) Effective length: 440mm (17.3in) Weight: 145g (5.1oz) [air] / approx.87g (3.0oz) [underwater] Compatible accessory: M5 Joint Shoe Base Spacer M5 Joint Lens Holder for Float Arm M6 Joint Direct Base III M6 Joint Direct Base YS RT Stick Arm Float S (maximum two)