Item Name: 10Pcs 3 Pin Mechanical Keyboard Switch RED for Cherry MX Keyboard Tester Kit. Product DescriptionFeature:Mounted on PCB to simulate actual key feeling.Very popular for typists who don't mind annoying their neighbors. A must have kit to try Cherry MX mechanical key switch.Specifications:Pin: 3 PinMaterial: PlasticInterface type: USBConnection mode: WiredSize: 15mm x 15mm x 20mm/0.59" x 0.59" x 0.79"Note:1.Please allow 1-2mm error due tomanualmeasurement.