JEBS CHOKE HV 12GA CRIO .685 MATTE JEBS High-Voltage Choke Tubes are designed to easily and effectively handle steel, lead, bismuth or any other shot you wish to shoot. The patented design gives the shooter a more consistent shot pattern, a more distinctive & shortened shot-stream, and incredible knock-down power for those much needed "longer shots." Choke Tubes are offered in Ported as well as Non-Ported models.