This surface signal is a must have for a safe dive. Features of this wonderful product include: Akona quality Surface signal device Hi-Visibility orange to stand out on the surface Independently inflated with mouthpiece To signal at night simply hold the AKONA light to the safety tube 40 long with 7.5" circumference Carry it always - 5.5" x 2.75" Compact nylon carry bag included Easily attachable snap clip Model #AKT102 Dive safely on your next dive with this great safety tube from Akona.