... at top, dome at bottom(7) one end dome , one end metal tip(thread)(8)one end dome ,one end plastic thread(italian,American ,Greek)Product Series ... coated Thread types: Italian screw, American screw, Greek screw and other plastic threadCaps: There are many kinds of plastic caps ... etc. 3. OEM Service: Welcome Customized sizes, PVC colors and patterns, plastic caps, etc. Please advise the details of your ...