Don't know that one mick, but my low-bridge DSE801 atts are stamped SLB and they are definitely NOT RN4072s. mypvshop.com sells the 4072 model. You might e-mail them and inquire:
myPVshop Electronic Cigarettes - The RN4072 Electronic Cigarette
Thanks Rav, I'll shoot them an e-mail and see what they tell me,.