3M™ Glass Bubbles A16/500 have a density of 0.16 g/cc and an isostatic crush strength of 500 psi. They have less than 1% sinkers ( >1.0 g/cc density particles) by volume and are surface treated to be compatible with buoyancy module manufacturing. Like other 3M™ Glass Bubbles in THE floated product series, this product is ideal for use in a number of aerospace and oil and gas applications.