The Aquatica Maintenance O-ring Kit for AD800 Nikon Housingcontain a main housing O-ring, two ports/extensions O-rings and a container of O-ring Lubricant and are recommended for traveling and general maintenance. The underwater camera housing needs a scheduled maintenance when left unused for longer time.
A pressure test or immersion without a camera inside is mandatory after changing any O-ring, failure to perform this test could result in serious damage to your camera and lens should the O-ring be improperly installed.