1,Track ball for Bb81xx,83xx,9000,89xx,9630 2. OEM and new 3.High quality 3.Free shipping if MOQ1000 4.One year wa Features :1. External dimensions :10.7mm*9.3mm, Height:6.0mm2. Ball diameter: 5.5mm3. Long lift: 1 million operations (each direction).Magnetic detection method.4. High resolution: 11 pulses/360°5. Temperature: -20°to 70°6. light transmitting type:LED mounted on a PWB7. Weight: 0. ...
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