Within .0005" and within .0001" PLX BMRsTM provide proven stability and are an affordable way to significantly improve the performance of any laser tracking system. PLX manufactures these BMRsTM in three different diameters: 1-1/2," 7/8" and 1/2" PLX unconditionally guarantees their BMRsTM to provide superior performance and compatibility with laser tracking systems from all manufacturers. For more information on PLX optical technology, contact PLX today.