Product Bulletins 2006-06-15 - UK announces that all of its Dry Boxes, UltraCase® and Loadout™ Case containers meet the EU standard for RoHS compliance. 2006-06-01 - Which main o-ring replacement should I use for a sunlight C4 or C8 light, 19925 or 19922? 2005-10-04 - UK introduces a substantially brighter verison of the Mini Q40 eLED® at DEMA 2005. 2005-09-26 - UK introduces its new improved Penlight S with a rubber protected click switch. 2004-11-03 - Original UK BC hanger redesigned for easier use 2004-01-30 - New UK4AA eLED® is tougher and saves money 2004-01-28 - 6-Watt eLED Dive Lights ready for shipment 2004-01-21 - New UK meshBAG joins uniBAG 2003-08-12 - New UK uniBAG ready for lobster season 2003-07-31 - New FATHOM 4 PAK released 2003-05-01 - UK releases new 2AA helmet light 2003-02-01 - UK begins shipping white LED 2AAA Mini-Pocket Light 2002-09-09 - UK announces the release of its completely redesigned UK4AA light 2002-05-01 - UK Announces New HYDRALLOY Dive Knives - Underwater Kinetics to Launch a New Headlamp Technology

Which main o-ring replacement should I use for a sunlight C4 or C8 light, 19925 or 19922?

A Late in the year 2000 UK changed the size of the main sealing o-ring used in the sunlight C4 and C8 lights to one which had a slightly larger cross-sectional diameter. To allow for the slightly fatter o-ring a slight groove was cut into the case at the base of the threads. Lights made after this change use the 19925 o-ring and earlier models use the 199222 o-ring. All Light Cannons use the 19925 o-ring even though there is not a groove in the case. The picture illustrates the differences. 

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