Darrell Jenkins custom E340 dutch lap siding mount Kami doorbell The 1 3/4 inches is

The 1 3/4 inches is perfect for allowing the doorbell when mounted on door trim to see past a brick wall that blocks the cameras peripheral vision

Wemo Smart Video Doorbell (a little extra bit of mount shows at the bottom)

com/pages/instructions on how to measure your siding

The closer you get the dimensions the more accurate your mount will be within +/- 1/8" of your measurements

Blink 4" vinyl siding 1/2 projection mount 20 degrees left or right  all in one mount that is solid color and all in one

Darrell Jenkins custom E340 dutch lap siding mount Kami doorbell The 1 3/4 inches isEufy E340 Video Doorbell (T8214) A = 5" B = 1. 75 C = 3. 25 D = . 375 Color = Black