The ALTECHNA Rhomboid Prisms are made up of a material of BK7, UVFS, TF10, IRFS, and FS. This device is used for imaging applications wherein it helps on displacing of the optical centerline without inverting the image. The Rhomboid Prisms are best use with demanding displacement applications because it's high tolerance angles. In addition to the said details, this device has dimension tolerance of +/- 0.1mm and an angular toelrance of +/- 5 arcseconds. It's surface quality ranges from 40 up to 20 scratch & dig. Moreover, the rhomboid prism has a flatness rate of < λ / 4 @ 633 nm.