Sculling oars( Rowing Oars) ultralight ( 100% carbon ) light (80% carbon) Standard ( 50% carbon) hybrid (20% carbon) specifications:Quantity (Pairs): Advised by clients.Blade option: ZJ-FD, ZJ-S, ZJ-SD, ZJ-B, ZJ-BD, ZJ-M.Handle : adjustable shaft( 5cm or 10cm adjustment ), fixed shaftweight: 1.3kg/pc (ultralight) 1.4kg/pc (light) 1.5kg/pc (standard) 1.65kg/pc (hybrid)Grip diameter option: 32mm, ...