1,Track ball for Bb81xx,83xx,9000,89xx,9630 2. OEM ... (Use of AN48840B Type)MechanicalOperating Force Push 1.0 N, 1.3 N, 1.6 N (Use of EVQP6 Type)Resolution ... one year, but it depends on the merchandise in question (please read specific note on the pro-forma invoice).9) .Samples: ... but we kindly ask you to pay for samples and the freight.10).Information: We update our customers with latest information ...