In 1988, Powell-Peralta released Vallely's first professional signature model skateboard. Initially adorned with graphics of a large bug, which was later changed to a graphic that featured an elephant.[2] In 1989, Vallely left Powell-Peralta, at which time the company was the largest skateboarding brand in the world.[citation needed] Following this departure, Vallely became involved with World Industries, a skater-run brand that was conceived of and launched with peers Steve Rocco, Jesse Martinez, and Rodney Mullen. World Industries created the second ever double-kick skateboard design (a skateboard deck with a kicktail at both ends). The first was the Vision Double Tail, which Vallely's double kick was modeled after but with a mellower kick and shorter tail than nose which would become the industry standard. A Vallely signature board was used for the new design's introduction into the retail market.[3]