These glass-filled nylon mounts are engineered to give all the support of an aluminum mount with half the weight. The webbing design gives rigidity, yet the mount will still break in a crash (saving expensive engine repairs). This is a round base mount, which is ideal for sharply pointed nose designs. Mounting hardware is included, and a nose gear hole is provided; this mount fits .09-.15 size engines. Fits crankcases from .925 to .965 inches wide (6/18/95 RDT).