30L Pump Sack for UL80v2 Sleeping Mats. Perfect Fit: Designed to fit UL80v2 Sleeping Mats, with a 21mm male-type nozzle that easily connects to the 22mm female-type valve. 30L Capacity: Inflate the UL80 effortlessly with a generous 30L capacity, ensuring you can achieve the desired firmness without hassle.