Classroom Keepers 15-Slot Mailbox

I have a mailbox that has an open slot that I would like to add a sensor to to detect new mail As there is no flap that is opened when mail

Classroom Keepers 30 Slot Mailbox, Blue by Classroom Keepers : : Office Products

slot car 1_24 Each mailbox is designed with an individual name tab for each slot Use tab to organize materials by student, subject or class period The 10-Slot Mailboxes

slot machine tricks to win Classroom Keepers 10-Slot Mailbox 10 Compartment - Compartment Size 3 x x 10 - Height x 21 Width x Depth - Wall Mountable - Recycled -