The DRYFOB (original 42mm diameter size) Waterproof Car Key Container will keep your key FOB safe and dry, even at depth! The patented design is made of anodized aluminum and employs a dual O-ring seal. Multiple mounting points allow you to attach DRYFOB to your BCD D-ring or attach it with a lanyard. It also fits well into most BCD pockets. The DRYFOB is neutrally buoyant with most car key FOBs. Easy to spot, DRYFOB comes with a metallic red or blue anodized coating. All DRYFOB models have a 1,200 ft (365m) depth rating!