18 in x 18 in x 1/4 in Solid Aluminum Optical Breadboard

18" x 18" x 1/4" Solid Aluminum Optical Breadboard, Black Anodized. Each aluminum breadboard has 1/4-20 tapped holes on 1 inch centers. Include 5 countersink mounting holes for rigid and single post mounting. Base Lab Tools slim design aluminum breadboards are ideal in applications with strict space & weight restrictions.