Inquiry (采购产品): lubricator model number: 304-2300-4 Good afternoon, I bought a lubricator model number 304-2300-4 with you and it came with a little sphere, however, I don't know what its function is and where it should be mounted. could please help me? **** Hidden Message ***** Fernando Silva 27933300 Company: Varco E-mail: fernando.silva@nov.com **** Hidden Message ***** fernando.silva@nov.com
