This Dryerbox measures 3 1/2" deep from the nailing flange to the back of the box. This Dryerbox has a very oval shaped hole on top to accomodate the squished 4" Snaplock pipe. Consider adding a 1x2 firring strip to the 2x4 wall and use our Model 425 box which has a round hole. Pricing does not include shipping costs. Click here for the 350 Virtual Tour.