Product Name: Single Sphere Expansion Joint
Structure: One Rubber Sphere Body with Two Flanges
Nominal Diameter: DN80 (3 Inch)
Materials:
Joint Body: NBR Rubber
Flange: SS 304
Flange Standard: ANSI B16.5, Class 150 LB
Usage: Water Treatment, Piping Connection
Source: https://www.landeepipefitting.com/single-sphere-expansion-joint-nbr-rubber-dn80-flanged-ends.html