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 planes. Mounting / hardware is included, and a nose gear hole is provided; this mount fits .15-.25 / size engines. / / Fits crankcases from 1.080 to 1.180 inches wide (6/18/95 RDT).