This is nice small wood box that can handle an object an inch thick. With some foam it would be a nice filter case. Inside measurements are 4.5" x 16.25", outside 5.5" x 17.25". The latches could use a little needle nose pliers to get to latch better. Used, with evidence of mild wear and a few stickers on the outside. $15 $3 shipping.
Will ship worldwide-if not in the USA, just send me your full mailing address so I can calculate costs. Payment via Paypal, cash, check, money order; credit cards at Paypal.