UPC# 00 021200 87815 2 3M ID 70070484038
 | Description3M Glass Bubbles K20 have a density of 0.2 g/cc and an isostatic crush strength of 500 psi. The general purpose K Series glass bubbles are the most economical 3M glass bubbles. Like all 3M glass bubbles, K20 bubbles are compatible with thermoset resins like polyurethane and epoxy, and are virtually insoluble in water. Description3M Glass Bubbles K20 have a density of 0.2 g/cc and an isostatic crush strength of 500 psi. The general purpose K Series glass bubbles are the most economical 3M glass bubbles. Like all 3M glass bubbles, K20 bubbles are compatible with thermoset resins like polyurethane and epoxy, and are virtually insoluble in water.
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