Go to http://www.aeroquip.com
They are a hose and fitting manufacturer of hydraulic hoses
and fittings. The #8 means 1/2" I.D. and #20 is 1-1/4" I.D.
Your hoses can have different pressure ratings, they can
have 1 or 2 wire braid, or for very high pressure, they can
be 4 wire spiral braid. Other manufacturers of hydraulic
hoses and fittings are Weatherhead, Goodyear, Gates, and
Dayco.
Good Luck,
Lisa
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