Thread Tension Rebuilt Kit Fits Singer Model 66, 99
-New replacement thread tension check spring, beehive spring, tension disc's and nut(color of nut may vary, silver or black).
-Fits Singer sewing machine models: 66, 99.
-The check spring pulls down.
-Note these will not work with the late model numbered dials or the early model 99's that use the 3/4" diameter disc.