If you are designing a timer into an OEM application, you probably could use some application assistance.
Here is a quick overview of timer resources from the world's largest timer manufacturer:

Single function cube timer with 10A SPDT relay output

Follow this link to choose any single function, including:

• Delay On Make (On Delay)

• Delay On Break (Off Delay)

• Recycle (On or Off time first)

• Single Shot

• Interval

• Many, many more!

Single function cube timer with 30A SPDT relay output

• Delay On Make (On Delay)

• Delay On Break (Off Delay)

• Recycle (On or Off time first)

• Single Shot

• Interval

• Many, many more!

Multifunction Plug-in timer

• 21 Timing Functions in one plug-in unit

• Timing range from 0.1 second to 1705 hours

A flasher is just a repeating on/off timer, learn more about flashers here.

Because the timer technologies often overlap with voltage monitor and liquid level control
technologies we include those links as well

And if you need more information, the best resource on the web is www.ssac.com.