ITEM NAME:Spare Part 10PCS 0.9mm to 0.9mm Watch Winding Stem Crown Connector Adapter Slot Product Description Feature: Hole diameter: (approx.) 0.9mm, stem diameter: (approx.) 0.9mm Overall length: (approx.) 4.3mm There is a slot for installing waterproof O ring. Package included: 10* Winding Stem Crown Connector.10 Winding Stem Crown Connector. There is a slot for installing waterproof O ring.
