The 3890 is the silicone O-ring used in the CO2 Bowen Ratio system. Customers will periodically need to replace worn-out O-rings.
Inner Diameter | 1.75 cm (0.69 in.) |
Outer Diameter | 2.01 cm (0.79 in.) |
Width | 0.16 cm (0.063 in.) |
Weight | 4.54 g (0.01 lb) |