BOARDS – GO FOIL, INC.,RIDE 5'6,Go Foil -Hydrofoils-Official site – GO FOIL, INC.,Volk® G-6 Gonio lens without flange, large ring, 63° mirror angles, 1.00x image mag., 1.00x laser spot size, 8.4mm contact diameter, ideal for static ,Go Foil -Hydrofoils-Official site – GO FOIL, INC.