SFE-N11 & SFE-N12 & SFE-N13 & SFE-N14 - SFE FLAME-PROOF CONTROL SWITCH SFE FLAME-PROOF CONTROL SWITCH SFE-N11 (d2 G4) SFE-N12 (d2 G4) SFE-N13 (d2 G4) SFE-N14 (d2 G4) SFE-N11 (d2 G4) Flame-Proof Tumbler Switch Box Selector Switch SFE-N12 (d2 G4) Flame-Proof Selector Switch Box SFE-N13 (d2 G4) Flame-Proof Push Button Box SFE-N14 (d2 G4) Flame-Proof Switch Box Push Button