SPI Precision Steel Parallels, Matched Pair, 1-1/2 Thick x 12 Long, 3 Height – 13-238-1

SPI Precision Steel Parallels, Matched Pair1-1/2" Thick x 12" Long, 3" Height High grade hardened tool steel Precision ground on all four sides Parallelism within 0.0005". Paired width is 0.001". Hardness: 50 RC Finished, packed and sold in pairs Specifica