350720D * 3-1/8″ EIA Female to 7/8″ EIA Female Step Reducer w/ 7/8″ Hardware Kit & O-Ring

350720D * 3-1/8″ EIA Female to 7/8″ EIA Female Step Reducer w/ 7/8″ Hardware Kit & O-Ring

350700D * 3-1/8″ EIA Female to 1-5/8″ EIA Female Step Reducer, w/ 3-1/8″ Hardware Kit & O-Ring (no bullets)