Sealife Small  Moisture muncher 10 capsules, 1.5 grams each Capsules fit inside the flash battery compartment to help protect lens and electronics from humidity Prevents damage and corrosion from harming your camera equipment Keeps lens from fogging up Fits all ReefMaster camera housings, and can also be used inside Sealife camera housing Dimensions: 5.9 x 5.9 x 1.6 inches (WxHxD); weighs 1.3 pounds