The outer surface 58 has a first circumferentially extending groove 64 which is slightly below {HEAD ~ the level} of the lip 62 and accommodates a first annular ring seal 66 and {TAIL ~ a second circumferentially extending groove} 68 near to the bottom of the sleeve which accommodates a second annular ring seal 70 
The outer surface 58 has a first circumferentially extending groove 64 which is slightly below { HEAD ~ the level } of the lip 62 and accommodates a first annular ring seal 66 and { TAIL ~ a second circumferentially extending groove } 68 near to the bottom of the sleeve which accommodates a second annular ring seal 70
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH