The LSC-1127 Lens Case from OM SYSTEM is a nylon drawstring lens case that is compatible with the M.Zuiko 300mm f/4.0 PRO lens or lenses of similar size. This nylon case measures 5.5" in diameter by 13" tall and features an external zippered pocket for small accessories. It has a handy carabiner for carrying or attaching to a strap or pack.