<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV><FONT size="2" style=""><FONT face="Arial, sans-serif">Hi All,</FONT></FONT></DIV><FONT size="2" style=""><FONT face="Arial, sans-serif"><DIV><FONT size="2" style=""><FONT face="Arial, sans-serif"><BR></FONT></FONT></DIV>Does anyone know a good source for macrospheres? 500psi would suffice. I was thinking I could fill the upper chamber area of my ferro-cement with macrospheres and seal that top area off . I could use almost pure macro spheres since that area is already a defined chamber. I tried to find Cliff's reference to </FONT></FONT> "Macrospheres - Cumings Corp BA-38 1/4-3/8"
12-15 lbm/ft3" from his article on the psubs website but no luck. <DIV><BR></DIV><DIV>Brian</DIV><DIV><BR></DIV><DIV><BR></DIV></DIV>