Main Category : Letter Boxes USPS Approved & For Private Use/Access Letter Boxes Fully Recessed H120R Fully Recessed Mail Box. Unit Size: 15"W x 19"H x 6.5"D (R.O.; 6.75"D) Anodized Aluminum/Silver – Standard Finish Q 1-3 $124.50; +4 Call Letter Box Semi-Recessed H120SR Semi- Recessed Letter Box. Unit Size: 15"W x 19"H x 6.5"D (R.O.; 4.5"D) Anodized Aluminum/Silver – Standard Finish Q 1-3 $149.50; +4 Call Letter Boxes Surface Mount H120SMS Surface Mount Letter Box. Unit Size: 15"W x 19"H x 6.5"D Anodized Aluminum/Silver – Standard Finish Q 1-3 $163.50; +4 Call Letter Box Fully Recessed H130R Fully Recessed Letter Box Unit Size: 15"W x 23"H x 6.5"D (R.O.; 6.75" D) Anodized Aluminum/Silver - Standard Finish Q 1-3 $159.50; +4 Call Letter Box Semi-Recessed H130SR Semi-Recessed Letter Box Unit Size: 15"W x 23"H x 6.5"D (R.O.; 4.5"D) Anodized Aluminum/Silver – Standard Finish Q 1-3 $ 175.50; +4 Call Letter Box Surface Mount H130SMS Surface Mount Letter Box Unit Size: 15"W x 23"H x 6.5"D Anodized Aluminum/Silver – Standard Finish Q 1-3 $195.50; +4 Call