Impact resistant aluminum bezel feature precision-milled 6061 aircraft-grade aluminum bezels with an ABS rear housing Automotive-style rear view mirror with two ball joints for maximum range of adjustment Heavy-duty steel clamp with low mass design for maximum strength and durability Convex mirror surface for wider viewing range and image stabilization Styled to compliment all SeizmikĀ« side view mirrors High impact ABS plastic housing resists damage Shatter-resistant safety glass. MIRROR HALO-RALUM PRO-FIT