Order Free Sample Linear Scales Linear Scale - PZ01L 160-205 (iC-Haus scale)Linear Scale - 20 μmLinear Scale - 80 μm (Broadcom scale) Glass Discs Glass Disc - PZ05S 69-1024 (iC-Haus scale)Glass Disc + Reticle Steel Tape Steel Tape - 20 μmSteel Tape - 40 μm