Power Box Fin X1 V4 21cm Select SM040010021

Power Box Fin X1 V4 21cm Select SM040010021

Description: The Select Power Box Fin X1.V4 21cm is a versatile wave fin engineered to deliver dependable drive and responsive control across multiple board setups. Built from a durable composite construction with a reinforced base, the X1.V4 balances stiffness and flex to give strong acceleration while remaining forgiving in turns. Its refined foil and rake deliver efficient thrust with reduced drag, allowing smoother rail-to-rail transitions and improved hold in critical sections. Designed to fit Power Box mount systems, the fin is compatible with quad, thruster, twinzer and single configurations so riders can fine-tune their setup to suit style and conditions. Corrosion-resistant materials and UV-stable finishes increase longevity for regular saltwater use. Lightweight and compact at 21 cm height, the X1.V4 is ideal for riders seeking an adaptable fin that scales between performance and predictability.

Key Features: - Durable composite construction with reinforced base for secure power-box mounting and long service life
- Universal compatibility with quad, thruster, twinzer and single board setups
- Optimized foil profile for improved thrust and reduced drag
- Balanced flex pattern for a combination of acceleration and responsive turning
- 21 cm height suited to a wide range of wave conditions and rider weights
- Precision-fit Power Box interface for easy installation and stable tracking
- UV- and saltwater-resistant materials to minimize degradation over time
- Lightweight design to preserve board feel and reduce rider fatigue
- Suitable for fine-tuning board behavior when mixed in multi-fin configurations

Specifications: Manufacturer: Select
SKU: SM040010021
Material: High-strength composite with reinforced base (manufacturer specification)
Size/Dimensions: 21 cm height (other dimensions vary by production)
Weight: Lightweight; exact weight not specified by manufacturer
Color: Refer to product images
Size: 21cm
Category: Fins
Age Group: Adults
Gender: Unisex

Recommended Use: Ideal for intermediate to advanced wave riders and all-around surfers who want one fin that adapts across multiple setups. Best suited for wave and freestyle use in beach breaks, point breaks and small-to-medium surf where versatility and drive are required. Performs well in variable conditions—combine in quads for speed, thrusters for control, or single setups for smooth carving. Pair with a compatible Power Box mounting system, a fin key and protective fin sleeve or board bag for transport and maintenance.