MVD Invert Roller Upgrade Kit for Pro G2 - YouTube
MVD double roller head – Blue Tuna Spearfishing Co
MVD Elite Double Roller kit for DIY and custom builds Spearguns! | eBay
MVD - We proudly announce our next generation invert roller kit: MVD Invert Roller G2 kit from 89.00 euros - High precision engineered to strict specifications - Metal parts made of inox