Necessary part to connect the pump to the multi-channel head. Offers up to a maximum of 12 channels. Compatible only with Core 120, Expert 120, and Ultimate pumps, which must be completed with the following accessories: - Adapter piece for the pump to the multi-channel head. Code 5261600 - C4, C8, or C12 multi-channel head. - Small*, Medium, or Large cassettes. *Small cassettes also require the tube retaining stop set. Multi-channel heads can be fully or partially filled with the number of cassettes installed. Each cassette can dispense a different flow rate if different diameter tubes are used. Both cassettes and tubes can be replaced quickly and easily during dosing.