Siemens 3SB3931-1AA Description Description Siemens ACCESSORY / SPARE PART ROUND, 22MM: BUTTON(SEAL) FLAT FOR ILLUMIN. PUSHBUTTON AND-SWITCH Related products SIEMENS 1790L811A SIEMENS 1FK7042-5AK71-1FB0 SIEMENS 1FN1910-0AA20-1AA0 SIEMENS 1FK7042-5AF71-1EA0 SIEMENS 1FN3150-4SA00-0AA0 SIEMENS 1FK7063-5AF71-1FG2