CP-21 non-automatic split casing hanger suspends the casing while incorporating the Type H packoff as the annulus seal.
CP-22 automatic wrap around casing hangers incorporate a lower packoff, slip bowl, and a single set of slips.
CP-29 automatic wrap around casing hangers incorporate a lower packoff, slip bowl and double slip segments. The CP-29 casing
hanger is designed to handle heavier casing loads.