1.different sizes, luminous appearance neotericstyle are its valued advantage 

2.special dimension can be made specially .they are used for allkinds of machine tools widely.

3.Black, high, strength, reinforced Bakelite, resistant tosolvents, oils greases and other chemical agents,

4.making this knob for using on medical machines, equipment forthe food and pharmaceutical industry 

5. wherever hygienic, climatic and environmental factors orlaws make it mandatory to use corrosion resistant magerials.

don''t worry about the price and the quality, wewill provide you with the best quality after-sales service andthe lowest price.