(scrubber cartridge XL + scrubber cylinder XL) The XL scrubber cylinder has the same outside measures like the standard scrubber (meaning it does not require any further modifications of CCR Liberty), but it can take 3.3 kg (7.25 lb) of sorbent, which is 30% more than with the standard scrubber. Similarly, the usability duration is increased, which is 3 hours and 15 minutes with the CO2 production of 1.6 l/min. Divers, who know their reals CO2 production can use this scrubber 5 to 8 hours, depending on their CO2 production and the difficulty of the dive.