Gear adjusting card guides on some models to monitor parallelism and simplify set-up Metal top and bottom on some models Zero flexing of card guides with steel reinforcing supports and molded ribs Standard ABS model (N) tolerates 60?C, plus optional models to 120?C Surface resistivity of 10 4 to 10 6 ohm/cm Removeable end stop Slot size is 5mm (0.196) Carrying handles on top and bottom Shipping Weight : 10.0000lb ESD Properties : Conductive Adjustment : Gear