3M VHB 4910 super-strong industrial adhesive tape with clear acrylic core. 3/4″ x 2-5/8″ (19 x 67 mm). Sized to fit on the base of the VPM-1 mod.
This adhesive tape is used to affix the VPM-1 mod to the vintage Ernie Ball volume pedals, as discussed in this blog. Can also be used with the larger modern Ernie Ball volume pedals (models 6165, 6166, 6167, 6168), if you don’t want to use the Large Format Adapter.
Please see the blog for details of how this adhesive might be used, and to get an idea of the pros and cons of using this attachment method.