Fits: Front Panel This Part Fits Model (s): 1730M, 1730MK, 2340M, 2340MK, 2540M, 2540MK, 3870M Includes (2) each 1/4" Male Tab; (1) Includes Knob •Time & Alert Specs: 60 Minutes, Bell Alert •Switch Specs: 16A @ 250VAC SPST •Mount Specs: 2 Hole - M4 @ 28.6mm (1.125") apart •Shaft Specs: 6mm (.236") dia. x 24mm (.945") lg. with Flat •Dimensions Specs: 59mm (2.322") dia. x 48mm (1.890") DP.