Hey Diver! You need this Diver Dry Box to keep your credit cards, cash, room key, car keys (it really hurts me when you get that car alarm keychain wet & you can't get into your car!), emergency phone number list or whatever else you just can't live without in to keep it dry. Wow! Was that the longest run-on sentence ever...

This dry box is o-ring sealed and has a carry strap.

Approximate external dimensions:
4.25" height x 2.875" width x 1.25" thickness

Internal opening approx 1" thick.