HP-65 Card Reader

[burkhard]

(11-26-2018 03:35 PM)Massimo Gnerucci Wrote:  Geoff says:

Quote: silicon tubing or small o-rings (inner diameter smaller then
outer diameter of post).

silicon tubing: ID 2.55 mm
OD 5.60 mm
Fuel line hose for model aircraft. Specify
military specs as the hole is dead centre and
therefore usable for pinch roller

o-rings ID 2.55 mm
OD 6.50 mm
Hardware store.

Please look at the two items I have made bold above. Shouldn't the OD dimension be the same whether silicone tubing or o-rings? It seems as if one might have digits switched, no?