UXELY Fibreglass Plate Sheet, Glassfibre Board, FR4 Glass Fiber Sheet Panel Home Epoxy Fiberglass Glass Craft Supplies 1mm, 2mm, 3mm, 4mm

I used this to make a speaker terminal panel for a sansui restoration and it worked perfectly

To me, the most important thing that separates this fiberglass sheet from the others I bought of the same type is precise forming. The thickness is exactly as stated, down to the last 0.01mm (as measured by my Mitutoyo calipers) and doesn't fluctuate, which helps getting perfect fit when building things from it much easier. I'd also like to mention good scratch resistance (noticeably better than in some other brands) and rigidity, which is almost comparable to carbon fiber sheets of the same thickness. Overall, a great product, if a bit expensive.

I use this in many of my projects in my hobby

Worked well, but in my opinion, a bit overpriced.

I bought this material with a bit of trepidation but have been very pleased to find it flat and smooth.