17mm 25mm 28mm 32mm 37.5mm 38mm 43mm 45mm all size of clutch
universal clutch,
have our own patent
can match all kind of chains,such as 4.5*12mm,6*12mm,7*12mm,5*13mm and so on
Our shutter accessories series products, variety, cheap, and has many patents, quality assurance, can be widely used in home decoration and construction engineering.
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