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??size：Header? Diameter 39mm? Thickness 10mm



https://img.alicdn.com/imgextra/i2/1640527707/TB23Q7sbpXXXXboXXXXXXXXXXXX_!!1640527707.jpg

https://img.alicdn.com/imgextra/i3/1640527707/TB2wyZlbpXXXXaPXpXXXXXXXXXX_!!1640527707.jpg