Check the listing for details. Spring Test Probe Pin 20pcs 0.9mm Tip 9mm Height 2mm Full Stroke. Condition: New. Listed at 9.58 USD. What is this?Spring pin is mainly used for connection electricity conduction . It is applied to mobile phones, mobile power supplies and other electronic products with stable performance and high contact performanceWhat will I get?Spring test probe, is in size of : 0.9mm/0.04-inch tip dia, 1.5mm/0.06-inch thimble diameter, 9mm/0.25-inch total length, 2mm/0.08-inch full strokeIn the package of: 20pcs x Spring test probeIs there any advantages of the product?Light weight, small size, easy to carry; Good contact, durable and long service lifeHow to use it?Steps of installation: 1. Select PCB probe with appropriate size; 2. Test PCB boardsWhat should I notice?Please select a PCB probe of appropriate size, especially the diameter of the probe tip.