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🔲 SEASIDE QUAD STYLE - Large Quad Fin Set (4 fins) works great for all surfboards. Inspired by Rob Machado’s seaside quads. 🔲 SMALL WAVE PERFORMANCE SURFING - These fins were designed for responsive surfing in smaller waves due to its upright, pivot-style template which allow the fins a very tight turn radius. 🔲 ULTRA DURABLE FIBERGLASS - Fiberglass is the strongest fin construction and has the best flex. If you invest in these fins today, you'll be able to start enjoying countless epic twin fin surf sessions. Side Fins Base: 5.6 Height: 4.9 Area: 21.2 ² Flat foil. Rear Fins Base: 4.1 Height: 3.1 Area: 10.1 ² Flat Foil. Compatible with Futures Single Tab Surfboards. If these aren't the best performing quads you've ever used, send them back for a refund and we will surf them ourselves! 🔲 RESPONSE, SPEED & CONTROL - Riders will notice quick response from the fins, and the perfect combination of speed and control. 10/10 flex rating for surfing with maximum drive and controlled release. 🔲 QUALITY GUARANTEED - Designed by 2 lifelong surfers in California, USA who stand behind their products. If you encounter any issues, we will make it right or refund your order. LET'S GO SURFING! ASIN B07CYGP3JS Color Single Tab Quad 4-Fin Set Brand Name Surf Squared Sport Type Surfboarding Item Weight 0.37 Kilograms Manufacturer Surf Squared Model Number 23021 Material Type Fiberglass Age Range Description Adult Item Dimensions L x W 5.6 L x 5.6 W Manufacturer Part Number 23021