This clear silicone rubber replica of a human ear and earcanal illustrates the various anatomic features of the earcanal. Great for demonstrating proper insertion of in-ear hearing protectors. This clear silicone rubber replica of a human ear and earcanal illustrates the various anatomic features of the earcanal. Great for demonstrating proper insertion of in-ear hearing protectors. (bul) Constructed of clear silicone (bul) A replica of a human external ear (bul) Allows easy visualization of outer ear structures from positions as viewed from outside the head, and from top and bottom, and front and back as seen from inside the head.