Arbor
Arbor Shims 1/2" x 3/4" x .047" Low Carbon Steel Qty 50
What stands out about the size is the 530*200*150cm or 208*79*59in, which is quite versatile.
Arbor Shims - Low Carbon Steel 25481
A nice touch on this air filter is the color coding for quick identification.
(20) ARBOR SHIMS 1/2x3/4x .020 PART # 25133 LOW CARBON STEEL USA MADE
A nice touch from Industrial Service Solutions is the fold-down handle for portability.