Jig for selecting valve part number or joint part number

A jig for selecting a valve part number or a joint part number represented by a combination of selected symbols representing respective selected conditions required for selecting a valve or a joint comprising:

• a substantially rectangular base plate defining an inner space, and
• a plurality of linear sliding gauges laterally arranged in the inner space to slide in a longitudinal direction of the base plate, each of the sliding gauges comprising a condition description area including a plurality of conditions thereon from which the selected condition is determined, and a symbol description area including a plurality of symbols thereon, both the conditions and the symbols arranged in a sliding direction of the sliding gauge,
• a plurality of condition selecting windows laterally arranged on a top of the base plate, each condition selecting window configured to expose one of the selected conditions,
• a plurality of symbol selecting windows laterally arranged on the top of the base plate longitudinally apart from the condition selecting windows, respectively, each symbol selecting window configured to expose one of the selected symbols,
• wherein a distance between both windows is equivalent to a fixed distance between each of the symbols in the symbol description area and its corresponding condition in the condition description area.