Shim synonyms

Shim the window as needed to make it level.

Very important for the study of Midrashic literature are the Yalgut (gleaning) Shim`oni, on the whole Bible, the Yalqut Mekhiri, on the Prophets, Psalms, Proverbs and Job, and the Midrash ha-gadhol, 2 all of which are of uncertain but late date and preserve earlier material.

I was dubious of whether I needed a shim but after fitting this heatsink I concluded that it is not needed.