Round Solid Aluminum BreadboardBase Lab Tools now offers circular solid aluminum optical breadboards in three sizes, 8", 12" and 18" (coming to the web this week) diameters.  Each breadboards is 1/2" thick and has a black anodized finish. Each aluminum breadboard has 1/4-20 tapped holes on 1 inch centers. Include 5 countersink mounting holes for rigid and single post mounting.  You can see the complete line of circular / round breadboards by clicking HERE.