Brand New Genuine Electro-Voice DL12BFH Recone Kit. Kit comes with 1 voice coil, 1 spider, 1 cone, 1 dustcap, 1 gasket, 2 pigtail leads and instructions. Plastic shims for centering the voice coil are included with the kit.
Used in SX300 and some versions of the Sentry 500.
Glue and epoxy will be required, but sold separately. You do not need dampner for the cloth edge, however EV uses silicoat (see picture) on the last roll of the edge. You can attempt to duplicate the silicoat effect with a bead of latex.