SOS Tracker Holder Part Number: IRN-NUR-STH General Characteristics: Designed to be light weight and compact, reaching 130N buoyancy when fully inflated using a 25g cylinder. The recommended spares are the universal crotch strap and the 25g re-arming pack. -Buoyancy: 13kgs. -Inflation System: two 25 grams. CO2 cylinders