CTX 3030 Seal Kit:
This kit contains:
3 x Rubber "O" rings for sealing the Battery Pack for the CTX 3030 and
2 x plastic bungs for water-proofing the headphone jack.
These are necessary for those people who are using the detector for underwater purposes or if you have lost parts.
The seal kit can also be used with the GPZ 7000 to ensure no dust gets into battery compartment (GPZ 7000 control box is not waterproof).