Micro Marketing Corp. is marketing Nickel ferrule and Sleeves which are produced by electrodeposition, not rolling, in our factory in japan.The production method we patented is very fine in quality due to electrodeposition thus, every product we produce is single mode of whice concentricity is under 1.4um and 75% of them are under 1.0um.Our Nickel ferrule is more benefiable in terms of quality and price for thinner outside diameter on 1.25mm ID due to our unique production method.