Optimize your surfboard's performance with these practical fin box fillers designed for Futures fin boxes. Perfect for reducing drag when you're not using all five fin positions, these lightweight plastic fillers seamlessly integrate into your board's setup. They're precisely engineered to fit Futures fin boxes, helping maintain smooth water flow across your board's bottom surface. Whether you're riding a twin fin, thruster, or quad setup, these black fillers ensure unused fin boxes don't create unnecessary resistance. Each package includes two sets of fin box fillers. Made in the US, these fillers are an essential accessory for surfers looking to fine-tune their board's hydrodynamics and maximize speed through the water.