This Canon Lens Case for your EF200 to 400mm F4L IS USM extender 1.4x lens provides great protection against any external damage. The hard casing with reinforced siding gives you maximum protection. It is geared with a folding handle on the top and the side to give you the desired comfort when carrying it. The slider can be locked with keys. It is equipped with rubber feet on the bottom and side. The molded and padded interior provides better protection from shocks and sudden jerks. The case also includes a shoulder strap that gives you the convenience to carry it around anywhere with ease.