Stem Extension Assortment. Useful for a quick fix to a short/broken stem, or if the broken stem is obsolete and not available as a replacement. Tap XX/YY, XX = female end, YY = male, threaded end. 12 different sizes, 5 pieces per size, 60 pieces in total. Most popular is Tap 90/90 = 0.90mm to 0.90mm = Tap 9 to Tap 9 SML 01
