These Sitech  PU rings for DIY fitting  on to your drysuit. The  most important thing is the correct adhesives (polyurethane based) must be used for fitting these rings .

The circumference of the section that is glued is 31.2cm, ensure that the end of the drysuit matches this.(please see at second picture with red marked option).

NOTE: You will need two per suit. Use these rings without the QCP Glove lock system then a Stiff ring will be need to hold the latex or Silflex seal in place. Stiff rings in stock as well.