Nasa Clipper Duet is/has:

Universal plug

Available in 6 square and 2 triangular tank sizes

Hull thickness up to 14 mm

and for mounting on air tubes in inflatable lifejackets

OB1141 Gul OverBoard 20L Classic Rygsæk Bimini Nasa Clipper Duet is/has:The Overboard Classic backpack is perfect for water sports and all types of activities. The 20 liter waterproof backpack protects your equipment from water, sand, dirt and dust. Thanks to a seamlessly welded construction and roller sealing system, the backpack is 100% waterproof and suitable for use in maritime and outdoor activities. So you can take it anywhere on the water. 100% waterproof backpack Class 3: IP66 Floats safely if dropped in water