UP SURF Surfboard fins Four fins (4 fins) Single tab fins - Honeycomb and Lightweight Function RM Size

["Compatible with Single Tab fin box.","Materials: glass fiberglass.This item uses ultra-durable fiberglass。These quad fins are LIGHTWEIGHT, RESPONSIVE, and FAST.","Quad Fins increase surf speed in small waves, and two front fins enhance the stability of the board. Suitable for most wave conditions.","Rear Fins Base:5.6inch；Height:4.92 inch. Front Fin Base:4.17 inch；Height:3.15 inch.The fin section is a traditional single-sided flat design, helping surfers to freely enjoy speed and passion on the waves.","DURABILITY: Tested and thrashed by UPSURF professional group to make sure what buyers ordered are durable enough for usage."]