Superior flow capacity, an unrivaled array of "real-world" design features and options, a valve body that is both ultra-compact and lightweight - yet exceptionally durable - this is Sierra 10, 15 and 18, the miniature valve with the maximum range. Both Serria 15 and 18 valve types available as body ported and manifold mounted. Sierra 10 is avilable as manifold mount only. 10mm Plug-N-Play Sierra 10 3-Way Manifold Mount Sierra 10 4- Way Manifold Mount Sierra 15 Body Ported Sierra 15 Manifold Mounted Sierra 18 Body Ported Sierra 18 Manifold Mounted