For sale is an unused 500w Opal bulb(110-120v) for use in the Durst 8x10 condensor enlarger,or the Durst 138 5x7 condensor enlarger.These bulbs are ultra-rare,and difficult to find.This is the best enlarger bulb ever made for these enlargers.This is the exact original type of bulb that Durst intended for use in their condensor enlargers.It gives the most perfect,even illumination and contrast for black and white or color printing.To prolong the life of the bulb,use a fan within the enlarger.When properly cared for,these bulbs can last for many years of high quality print work.The 500 w of light from this bulb is preffered over the 300w version,when doing wall sized mural printing.It will allow the option of stopping down,and give you shorter exposure times on 4 foot by 8 foot prints.There is FREE SHIPPING and FREE INSURANCE anywhere within continental USA or Canada.Other locations will require additional shipping fees.Please contact for a quote for your area.Any customs duties,fees,taxes or other costs are the sole responsibility of the buyer....Buy with confidence,since your purchase is fully insured for loss or damage....Thanks for viewing.