The original design comprises a bullet shaped end but numerous alternatives are now available based on single ended versions of other mount types.
The plate mounted SP styles e.g. 8050NTP are suited to high shock forces and can be produced in various natural and synthetic rubber materials. The bobbin mount based versions eg 3225/OEO are also available in various materials.
For more information on these variants go to SP Mount or Bobbin Mount
These mounts may also be used, if appropriate to loading, as mounting feet.