Our tactical-inspired diving helmet is designed for maximum efficiency and modularity. It comes with two helmet light mounts, offering broad compatibility with BigBlue lights. The helmet is also fully compatible with GoPro® mounts (sold separately) and BigBlue HL Series helmet lights (sold separately), making it an adaptable platform for technical divers seeking a streamlined, customizable setup. The tech helmets are available in two shell sizes and feature adjustable knobs to ensure a perfect fit for every head shape. They are compatible with the Helmet 3000 Series light mount, and by special request can be finished in glossy white, glossy orange, or glossy red. Specifications Shell Size LARGE Head size 52 - 60cm. Size: 180 x 275mm. Weight: 585g. Shell Material: ABS. Shell Size X-LARGE Head size 56 - 62cm. Size: 195 x 285mm. Weight: 625g. Shell Material: ABS. Inside Helmet Fitting Pads: Included. Helmet Light Mounts: 2 pcs, Included. Colors: Our standard colors are Urban Tac Grey and Charcoal Black. Glossy Orange, Glossy White, and Glossy Red are available on special request.