Future Fins Stretch Quad QF4 RTM Quad Rears come with 1/2" base Front Fins: VII QF4 Outline: D. Haut Height: 4.38 in – 11.1 cm Base: 4.22 in – 10.7 cm Area: 14.22 in² – 91.74 cm² Recommended Rears: 375 Quad Rear Height: 3.75 in – 9.5 cm Base: 3.64 in – 9.2 cm Area: 10.9 in² – 70.32 cm² Tangs: ½" & ¾" Perfectly balanced template for the average size rider. Stability and speed along with a forgiving outline can be used as an explosive setup for quads in most any conditions. Available Materials: RTM (resin transfer molded)