Ordered MG16303111-003 Joint, Knob, and Screw for Magnifying Lamp. I have an old HarborFreight fluorescent lamp that the joint recently disintegrated. Left note with order what it was for and to sub if needed. Received call from BoliOptics prior to shipping. They had looked at HarborFreight website, looked at my lamp, and concluded that they thought this item would work (as I had). They said that I could send pictures of my lamp and they would examine further. I didn't think that was necessary, considering price of the part. Received part in mail today and installed. Screw and Knob didn't fit, but the joint replaced my disintegrated part nicely! Wow! Impressive support for a $10 part! Thank you, thank you, thank you!