These PTFE O rings are specially made to use as gaskets in glass fittings. These are provided with a collar which helps to locate it on the glass end correctly.
| Cat.Ref. | DN | D | D1 | d | L |
| TR1* | 25 | 4 | 33 | 3 | 5 |
| TR1.5* | 40 | 57 | 48 | 3 | 5 |
| TR2* | 50 | 70 | 59 | 3 | 5 |
| TR3* | 80 | 100 | 88 | 3 | 5 |
| TR4* | 100 | 134 | 119 | 4 | 6 |
| TR6* | 150 | 186 | 168 | 4 | 6 |
| TR9* | 225 | 260 | 236 | 4 | 7 |
| TR12* | 300 | 342 | 318 | 4 | 7 |
| TR16 | 400 | 467 | 435 | 6 | 7 |
| TR18* | 450 | 537 | 490 | 6 | 7 |
| TR24 | 600 | 686 | 640 | 8 | 10 |
| TR32 | 800 | 910 | 885 | 10 | 12 |
* marked items are available fast.
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