<ul><li>Drop slot opening 10" wide and 1/2" thick, for large envelopes and legal size papers</li><li>Recommended wall thickness for proper installation is between 4" to 7".</li><li>Chute is adjustable for walls between 3-D/4" - 7-3/4" thick</li><li>Mounting hardware for Wood and concrete is included</li><li>Indoor use only.</li></ul><br><br>This drop box with an adjustable chute is designed for check drop, letters, paperwork, large envelopes.

Protex MDL-170 Wall/Door Through Drop Box,for Keys, car remotes, Cash, Checks and envelopes, Metal Baffle, Pre-drilled mounting Holes,Double Steel Door, with Adjustable Chute