... channelDG-N(6 rollers)0.5×0.8, 1×1,2×1, 2.4×0.80.06~30 per channelDG- ... and high precise transfer.2. Acceptable pump heads for YZ1515x, YZ2515x, SN25, DG-1, DG-2, DG-4, DG-6 ... full and empty help you to quickly dischagre the air from tubing and fill the fluid.5. High torque ... and low power loss, connect many pump heads in series or install multichannel pump head for satisfying the different application ...