Product Name: PTFE Lined Expansion Joint
Type: Expansion Joint
Body & Bellows Material: Stainless Steel SS 304 (or SS 316)
Lining Material: PTFE (Teflon) Lined
Size: 4 Inch, DN100
Pressure Rating: Class 150 LB, PN20
Size Range: DN50–DN600, 2-24 Inch
End Connection: RF Flanged Ends, ASME B16.5
Package: Wooden Case
Source: https://www.landeepipefitting.com/ptfe-lined-expansion-joint-ss-304-316-4-in-cl150-flanged.html