ReedGeek Universal G4 Plaque and Guage Combo Set Universal G4 Plaque and Guage Combo Set This Combo Set features the ReedGeek Universal G4 Reed Tool, along with the ReedGeek Plaque and Guage Set The Plaque and Guage Set allows you to determine mouthpiece facing lengths and gauge the position for most effective reed adjustment and balancing The top of the plaque can also be used to support the reed for general reed working This item contains the ReedGeek Universal G4, an incredible "must have" accessory for any reed player