50-319-3 SPI Black Granite Parallel - 4 Faces: 2" x 3" x 18"
The SPI 50-319-3 Black Granite Parallel has the following specifications:
Features:
SPI Black Granite Parallels - 2 Faces - Laboratory Grade AA +/- .000025"
SPI Black Granite Parallels - 4 Faces - Laboratory Grade AA +/- .000025"
SPI Black Granite Parallels - 2 Faces - Laboratory Grade A +/- .000050"
SPI Black Granite Parallels - 4 Faces - Laboratory Grade A +/- .000050"