A pair of the spring clips for holding the glass in place. These clips can be used on all 4 corners of the bed, or on the back two corners as preferred.
These are official Ultimaker spare parts, compatible with the following printers:
Official Ultimaker Spare Parts - compatible with the Ultimaker 3, Ultimaker 3 Extended, Ultimaker 2+, Ultimaker 2 Extended+, Ultimaker 2, Ultimaker 2 Extended, Ultimaker Original, and Ultimaker Original+.
Now includes 2 x Retaining Collets and 2x Blue Clips.