for 3D printer parts lite Rotary Spool Holder Green versions lite upgrade 3D printer Accessories The AlMS lite Rotary Spool Holder is designed to support and hold the spool when it's attached to the AlMS lite. Each rotary spool holder has 3 spool claws to secure the spool in place.While the unit pulls the filament, the rotary spool holder works in conrdination to enable the spool to rotate during the printing processThis ensures continuous filament feedingand smooth operation. The rotary spool holder is designed in green versions to work with the left and right feeder units for filament feeding. For the green version, the two holders are instaled on the bottom-right roler and top-left roller,rotating countercdockwiseto feed flament to slots 1 and 3. NOTE: Please note that the spool holder can only be installed and correctly operated on the roller that matches its color version.Please confirm that you have the correct version before purchase Color: As Shown Material: plastic Package Contents: 1 * Rotary Spool Holder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.