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divegeek:I don't know if it has two O-rings, but you can't beat the price: http://www.abysmal.com/Merchant2/me...n=PROD&Product_Code=Light-3C&Category_Code=LT
VTernovski:Agreed!
just picked up two Abyss lights on sale. the price is right! The light look exactly like Manta light, and is pretty much Halcyon Scout clone. it's uses the same UK head.