... Oil Tools Co.,Ltd is one of the top level screw connector manufacturers and suppliers,Website:http://www.zztopdownhole.com, with ... downhole tools/tubing string, it is connected by the grub screw compacting on the prefabricated pit on the coiled tubing, the ... connected exactly.2.Feature and benefits*A specially designed Grub Screw retains the Coiled Tubingwithin the Connector*All Outline Connectors are ...