Enables you to extend the existing stem, change thread size to larger or smaller tap size. Available in Tap Size 6 (Ø0.60mm), Tap size 7 (Ø0.70mm), Tap Size 8 (Ø0.80mm) Tap Size 9 (Ø0.90mm), Tap Size 10 (Ø1.00mm), Tap Size 11 (Ø1.10mm) & Tap Size 12 (Ø1.20mm).
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