Switch housing material: Polycarbonate Stem material: Polycarbonate Lifespan: > 50 million actuations Pretravel: 2.0 (± 0.6 mm) Total travel: 4 mm (± 0.3 mm) Actuation force: 55 gf, 62 gf, or 67 gf (± 10 gf) Operating force: 15 gf