These are left over from a production project. Recycled rubber sheets, 0.150" thick cut to 20" x 8". Exact rubber type unknown, these are fairly soft, durometer is probably about 30-40 on the Shore A scale.
RUBBER HARDNESS TESTER BY MEYERS - NEVER USED! - SHORE-A DUROMETER: for testing the hardness of tires, soft rubber rollers and other elastomer materials. (ASTM--D--2240) Compact design fits in tight spaces.
ORIGINAL NEW Exclusive BARISTA RUBBER TAMPING CORNER MAT SILICON BLACK FOR COFFEE ESPRESSO MACHINE, WITH TAMPER AND PORTAFILTER INSERT EXCELENT FOR GAGGIA CLASSIC, BABY, RANCILIO SILVIA, NUOVA SIMONELLI E.T.A.
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