Description: 【Double Layers Design】: The upper layer of the electrical tester case is universal with the ET310 circuit breaker detector, socket repair tool kit, and RT250GFCI socket tester. The bottom layer is universal with the electrical voltage test kit and MM400///ET140/MM720 digital multimeter. 【6 Elastic Bands】: The portable case adopts 6 highly elastic bands of different sizes, and the closure can be flexibly adjusted to accommodate tools of different sizes. The design of the elastic band can firmly fix the tool, reduce friction and collision, and prevent the tool from being scratched or deformed 【Large Capacity】: In addition to the elastic band compartment, this circuit tester storage box is also equipped with two large zippered mesh pockets and a front pocket, which can accommodate socket repair tool kits, wires, batteries and other small items, etc., which can meet your daily work storage needs 【All Round Protection】: The outer layer of the voltage detection bag is made of polyester, which is waterproof, scratch-resistant and tear-resistant. It is filled with thickened shock-absorbing cotton all around, and the lining is soft and comfortable, providing comprehensive protection for the tools to prevent scratches, collisions and moisture 【Portable】: The portable circuit breaker storage box is compact and lightweight, and the sturdy and comfortable handle allows you to easily take the tools anywhere Specification: Material:Polyester Size Chart: 28cmx9.5cmx21cm/11.02inchx3.74inchx8.27inch Package Includes: 1 Test Kit Bag Note: Please allow slightly errors 1-2cm differences due to manual measurement.