タイトルまたは説明

we may supply the semi-product for lab glassware as you requird.
We are producing and supplying semi-products for lab glassware, gound joint is one kind of them, we can make US standard like *4/*0,*9/*2,*4/*0,*9/*2 etc and British standard like *4/*3,*4/*9,*9/*2 ect, and we also supply ball joint and socket joint ,please check the picture for detail.
All of our joints are grounded by machine first and then grounded by hand carefully .