{"product_id":"2x-flat-rubber-watch-gasket-ring-case-back-seal-6-39mm-screw-down-replacement","title":"2x Flat Rubber Watch Gasket Ring Case Back Seal 6-39mm Screw Down Replacement","description":"\u003cp\u003eFlat-profile black case back gaskets, 6–39mm size range – rectangular section, not round O-rings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e⭐ At a glance\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e📏 \u003cstrong\u003eSize range:\u003c\/strong\u003e 6–39mm\u003c\/p\u003e\u003cp\u003eSizes are shown as inner × outer diameter — pick your thickness from the second menu\u003c\/p\u003e\u003cp\u003e✅ \u003cstrong\u003eUse:\u003c\/strong\u003e flat case back seal for screw-down backs with a groove or recess\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProfile:\u003c\/strong\u003e flat, rectangular cross-section, black, matte finish\u003c\/p\u003e\u003cp\u003e✔️ \u003cstrong\u003eCondition:\u003c\/strong\u003e new\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFits by dimension, not 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