ITEM NAME:22mm emergency stop switch button big mushroom head red LAY50-22D-3C Description: Opening: 22MM Contact: 10A is always open and closed Operation mode: emergency mode Contact Structure: Normally Closed Button Working current: 10 (A) Rated heating current: 10 (A) Contact resistance: 1 (_) Insulation resistance: 1 (M_) Mechanical life: 10000 (times) Package includes: 1Pc.Opening: 22MM. Insulation resistance: 1 (M_).