No ring, just wrap + filler.

The sealing element of the spiral wound gasket consists of a vshaped metal strip spirally wound in combination with a soft sealing material filler. The metal strip provides outstanding resilience, while the flexible sealing filler guarantees excellent sealing. Due to this combination of materials the spiral wound gasket is suitable for sealing under severely fluctuating temperature and pressure conditions. Depending on the application the spiral wound gasket can be specified with outer and/or inner rings.

This style of gasket is mainly used for male and female flanges or projection and recess flanges and used in load-bearing flange configurations, such as tongue and groove flanges. Standard dimensions according to EN/ASME.

Please indicate required size in the comments.