For Sale - Used Channel Islands M-13 8'0,Used Channel Islands 6'8 M13 Surfboard | Rider Shack Surf Shop,Problems on an Al Merrick M13 - advice - RealSurf Surfers' Forum,The M23 comes from the storied M13 bloodlines, a favorite,Channel Islands Happy Everyday Spine-Tek 5'10 x 19 ¾ x 2 ½