Polyurethane spacers work well, and I have never seen or heard of any problems with them breaking down.
A person could use aluminum and to make spacers, but it is not worth the time/effort as poly spacer cost about $35 a pair.
Total US debt has increased by 70% under Obama, from $10.625 trillion on January 21, 2009 to $18.005 trillion January 1, 2015.
Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ......
Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.