25 years after designing the thruster, Simon Anderson is producing quads. These fins are for his small wave quad boards. Both the front and rear fins have proportionally the same outline resulting in superior handling, speed and control. The Medium template will suit small to medium surfers while the Large template will cater for larger surfers.Performance Core material and construction is designed to deliver the feeling of a traditional fiberglass fin with the added performance of reduced weight. The RTM (Resin Transfer Moulding) process produces a lightweight fin with remarkable flex, a smooth feel and an impressive aesthetic.