Blackstix Twin+1Futures Blackstix Twin+1 Fin Set The Blackstix Twin +1 features a pivot style twin fin pair with a smaller trailing fin for added stability. Built in Futures Blackstix carbon fiber technology with a V2 inside foil, the fin generates speed easily, offering smooth rail to rail transitions for high performance surfing. This set performs great in wave faces ranging from 2 8, in everything from soft beach breaks to fast point breaks. Template Category