I bought these because I wanted to try twin stabs. They're working well, so I'm selling other twin stabs. I'm selling them at a bargain price, so please give twin stabs a try and go surfing! They're very good. This is a set of 3 fins: universal side fins and a stabilizer fin for surfboards. 【Product Details】 Center Fin ▶ Base Width: 98mm ・Height: 87.5mm ・Width: 125mm｜Thickness: 7mm｜ Side Fins ▶ Base Width: 98mm ・Height: 132mm ・Width: 195mm｜Thickness: 6.8mm｜ Material: 30% fiberglass + nylon material + carbon composite (※Not soft fins.) High flex and soft flex, easy to control, recommended for beginners. Ideal for waves with little power or small waves, such as fin kicks and drive turns. ※Due to the nature of the carbon composite material, there may be patterns on the surface of the fins. There is no problem with the product. ※If the fins do not fit, please check the fin screws, apply wax, and adjust with sanding (sandpaper). - Type: FCS2 compatible type Take off Performance board Beginner Surfboard Surfing Shortboard Durable Placebo placebo Al Merrick High Five Mold Lost Mayhem lost mayhem xtr gskste G Skate g skate #fcs #fcs2 #fin #performer #carver #reactor #am #mf #jw #accelerator #ft #ka #rm #mr #keel #twin #dhd #aircore #pc #pcc #neo #surfboard #fcsII #pyzel #hi #h4 #ci #christenson #thomas #wingnut Fin System/Fin Box: FCS2 Number of Fins: Tri-fin Fin System/Fin Box: FCS2 Number of Fins: Tri-fin Number of Fins: 2+1 (single stabilizer)