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Flashtube for the Einstein™ E640 flash unit. All Paul C. Buff™ flashtubes are user-replaceable and arrive with instructions for replacement.
*It is not necessary to purchase a flashtube separately when you are purchasing a flash unit however it is never a bad idea to have a spare flashtube on hand as a back-up in the event of breakage. Please note to always wear gloves when handling the flashtubes as the oils from your hands may damage the bulb, shortening its lifespan.