... ,the first time we produce the outside thread 3/8 and other places,and the second time we produce the inside thread 1 ... For Ring Gage, Athread Gage.1)high quality, and reasonable price,the color and size can do as customers' requestswe can do ... package as customers' requests(carbon,pallet and export package)2)promptly deliery3) advanced measuring & testing equipment: ...