Waters SYNAPT G2 Operator's, Overview And Maintenance Manual page 120

12. Holding the PEEK terminal block gently, use the needle-nose pliers to
gently grasp the heat-shrink tubing on the heater cartridge assembly
and carefully slide it and the PEEK terminal block out of the ion block.
Heater cartridge assembly
13. Using the O-ring removal kit, carefully remove the cover seal from the
ion block (see
5-42 Maintenance Procedures
Heat-shrink tubing
page 5-17).
PEEK terminal block
Cover seal
Cone gas O-ring