this ew-73b lens hood is designed for special lens, it can block stray light by extending and shading the end of the canon ef-s 17-85mm f/4-5.6 is usm lens and prevent the lens from scratch. also the bayonet mount design makes it firmly on your lens. give you better photographic experiences.

suitable for
canon ef-s 17-85mm f/4-5.6 is usm
canon ef-s 18-135mm f/3.5-5.6 is
canon ef-s 18-135mm f/3.5-5.6 is stm

specification:
color: black
bayonet mount lens hood
size: 40 (h) x 88 (dia) mm
weight: 20g

package contents:
1 x lens hood for canon ew -73b