Hang Ten Super Fish Soft Surfboard, Dark Blue, 6-Feet Deck: WBS IXL (crosslink polyethylene with water barrier skin) Core: EPS (expanded beaded polystyrene) Stringers: 2 wooden marine grade 7-ply wood Stringers molded into the core Bottom: Surly re-in forced with PP diamond mesh Fins: tri fins, one (1) center fin and two (2) side fins with six (6) screws and leash tab