h2 TTC Dustproof Gold Micro Switch /h2 b 5-fold dust-proof structure design, increase dust-proof effect by more than 10 times /b b Characteristic: /b - The design is original and the effect is visible - The first dust-proof structure, 24K gold contacts, no double-click. - Imported flexible memory cymbal copper metal in original American packaging - Corrosion and oxidation resistance, - High sensitivity, High reliability, and long-term freshness.