This is for a Sigma 120-400mm telephoto lens with optical stabilization. The tripod mount ring, lens, both front and rear caps are included. The lens is in great condition, and all mechanisms have been checked and are fully functioning (including the stabilization feature). This lens fits Canon EF mounts. The glass on this lens is in excellent shape, and there aren't any noticeable blemishes. There is some scuff marks on the bottom of the tripod mount ring. I offer a 30 day no questions asked return policy. I will ship your lens very quickly, usually same day.