Sistema de resistividad y tomografa IP WGMD 9: compre producto en WDA 1 Super Digital DC Resistivity IP Meter Geotech Instrument Co., Ltd. Instrumento de resistividad de electrodos de resistividad 2 3D de Conformer Paperboard Mailers Open Side 7 3 8" x 9 5 8" White 250 Pack. This mailer features a tamper evident secure closure that will not open during shipment. It also has a convenient E. Z. open tab that eliminates the need to use sharp utensils for opening. Plus, it provides the ultimate strength to protect your product during shipment.