This is for 10-- 1/4-inch and 10-- 3/8-inch hot water pressure washer o-rings.
These are high performance O-RINGS and made for pressure washer and steam machines.
These have a standard operating temperature of -65 deg to +300 deg F. 
  (10) 3/8" Quick Disconnect EPDM O-Rings for hot water and steam up to 400°F  and
  (10) 1/4" Quick Disconnect EPDM O-Rings for hot water and steam up to 400°F
These provides great tear and abrasion resistance with high psi rating.
EPDM also has good resistance against chemicals, such as alkalis, dilute solvents, and ethylene glycols solvents.
EPDM o-ring are not used with petroleum fuels because significant swelling would result.
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