ויעשו על שולי המעיל רמוני תכלת... ויעשו פעמוני זהב טהור ויתנו את הפעמונים בתוך הרימונים על שולי המעיל סביב בתוך הרימונם פעמון ורימון פעמון ורימון על שולי המעיל סביב
Rashi explains that the rimonim were colored wool, shaped as a ball and hollow within. Between each two rimonim hung a gold paamon which served as the sound-maker to inform people that the Kohen Gadol was approaching. Ramban disagrees, contending that rimonim were not present to “hang around” between the paamonim. He feels that the rimonim were hollow for one purpose: so that the paamonim would be placed inside of them. Clearly, the Bigdei Kehunah, Priestly vestments, and indeed all of the klei, vessels, of the Mishkan were there for a lofty purpose, with concealed esoteric secrets to be derived…