Four thumbscrews are used to attach the condenser lamphouse to the lifting arm assembly on Omega D-5, D-2, D-6, and D-3 enlargers. If the thumbscrews for your condenser lamphouse are missing or damaged, this is a complete set of four used screws. (If you require just one or two replacement screws, we also offer the same screws new, sold individually - please see the separate listing.)
These screws are used, so expect that there may be minor marks or discoloration, but they have been inspected for thread damage and wear, and are in excellent condition.