Harley Ingleby MID fins, a tri-fin (thruster) and quad design made of performance core material, can handle any wave. The material is air core. Used only once, in excellent condition. No scratches, no noticeable stains. Please consider without discounts. - Model: Harley Ingleby MID II - Series: MID Series - Size: LARGE - Type: Tri-Quad - Material: Performance Core Moe MID6 Best for other mid-lengths.