The standard "GW" packer cup, molded using a very tough 80 durometer proprietary nitrile rubber compound. The "GW-SS" is reinforced by loop-formed spring steel wires. This cup is for standard, limited pressure, moderate temperature service.
* FHD-GW: For a Heavy Duty Flurocarbon Cup, replace "-001" with "-003" (ex. TI-54864-001 becomes TI-54864-003).
** SEAL-GW: Has a smaller I.D. with o-ring for sealing insurance; on cups 10 3/4" & larger they do not have a smaller I.D., but if an oring is desired add a -007 to the base part number (ex. TI-14246 becomes TI-14246-007