Full length: 77mm (3.0in) Weight: 69g (2.4oz) [air] / approx.40g (1.4oz) [underwater] Compatible products（Top M6 screw） Z-330, D-200, S-2000, Z-240, D-2000, D-2000S, D-2000W/Wn, D-180, D-180S, Z-220, Z-220S, Z-220F SD Mount Cage for HERO3/3 /4 (※) SD Front Mask for HERO5/6/7 SD Front Mask STD SD Mount Base for TG-Tracker SD Mount Base UWH1 When installing this product to INON "SD Mount Cage for HERO3/3 /4", optional "Rubber Spacer" is required to attach on the SD Mount Cage (*Rubber Spacer is not packaged as standard accessory). So please consult your purchasing dealer if you attach this product on INON SD Mount Cage.