bambu42. When the AMS is not being used: - Connect the PTFE tube from the tool head to the OUT end of the Bambu 4-in-1 PTFE Adapter. - Directly insert a maximum of four filament wires into eachFully Automated, 256*256*256mm³ Print Volume, 4-Color Printing with AMS lite, Bambu Lab A1 3D printer delivers reliable and speedy 3D printing effortlessly, makes 3D printing easier