<https://bmisurplus.com/product/brunson-188-auto-reflection-target/#product>
<http://schema.org/description>
"Brunson 188 Auto Reflection Target\n\nThis is a multiple paired-line glass target used with transits or levels equipped for autocollimation (having a light source). \n ***MPN 188\n ***OEM Brunson\n ***SKU*** 42488"
<https://bmisurplus.com/product/brunson-188-auto-reflection-target/>