Includes4 x Sintered Bushing - Part 10564 x Sliding Block Spring - Part 11682 x Timing Belt 2SM 200 - 11884 x Timing Belt 2SM 610 - 11898 x Sliding Block Half UM2- 1255Compatible with Ultimaker 2Ultimaker 2 ExtendedUltimaker 2+Ultimaker 2 Extended+