Specifications Bezel Part Numbers 3100/041 (overall size 1-3/4" x 1-5/32") for 3125, 3126 APM 3100/370 (overall size 2-5/16" x 27/32") for 3135, 3136 APM 3100/397 (overall size 3" x 5-1/4") for 3145, 3146APM.