Puluz Floaty Sponge Waterproof Case Backdoor Cover with 3M Adhesive Sticker + Lanyard for SJ4000 Easy to spot flotation backdoor lets your SJ4000 camera float in water Industrial strength 3M adhesive backing attaches the floaty directly to the SJ4000 waterhousing backdoor A spare waterhousing backplate is included Size :	Case: 70mm x 53mm x 8mm, Floaty: 63mm x 48mm x 23mm