Ricon is recalling the egress window handles of certain Ricon 3-Minute Urban Transit Bus egress window sets manufactured April 1, 2010, through October 31, 2010, sold and installed as original equipment for various transit buses. The composition of the material used to cast the handles is incorrect resulting in embrittlement of the handle and a reduction in material strength. The handle(s) on the emergency egress passenger windows may break before the window latch is released.