This (Right Hand) Davis sight has a 4" elevation bar and a 5" extension. I received it a week ago and it hasn't been mounted.
I ordered it with the 2-knob mount for repeatability and with the NEW style aperture block that fully supports the scope rod to eliminate breakage. It also was ordered with an EXTRA aperture block so that I could swap scopes readily without losing zero.
Comes with a protective carrying case!
Cost to my door was $190 when it was all said and done. Your cost delivered will be $150 by postal money order. Add 3% for Paypal.