The potentiometer product uses the environmental protection material production, some sgs report. The potentiometer carbon piece uses the japanese import carbon thick liquid aluminum paste production, the potentiometer main body uses taiwan to construct inundates the bakelite sheet, produces the potentiometer synchronism is good, does not have the static. The potentiometer knob has the following size: 14*0.8 14*1 14*2 16*1 16*2 16*2.8 18*2 20*2 and so on. Has the black and the white, or may defer to the customer to request to mix colors. Potentiometer entire resistance value: 500ª+~1m Potentiometer entire resistance value deviation: positive and negative 20% Potentiometer rated power: 0.03w Potentiometer highest use voltage: 50v ac 12v dc Potentiometer impedance change characteristic: a b c d Potentiometer residual impedance: 20ª+ Potentiometer insulation impedance: 100mª+min. At 100v ac Standing voltage less-than 100mv (at 20v dc) Potentiometer synchronization error: 4db Entire rotation angle: 270 degree Potentiometer rotative moment: 5~100gf. Cm Potentiometer rotation stops the files intensity: 0.6kgf. Cm Potentiometer knob's pressure pulls the intensity: 0.5kgf Potentiometer life: 10000 Also has our product to be able to satisfy the customer special high quality request, the carbon piece uses the gold-plated manufacture, can satisfy 50000 times the above life.