Overview The Filament buffer is an accessory that is required in conjunction with a single AMS unit. Its function is to provide a buffering effect for the filament. The interface is 4-Pin cable with 3mm pitch with snap terminal input, 6-Pin cable with 3mm pitch open snap terminal output. Compatibility X1 Series, P1P Note For multiple AMS units, the AMS Hub is required instead of the Filament buffer. In the Box Filament buffer, 2x M3*23 screws