Pentair Washer 195610

I purchased a washer, metal and round
To replace another I dropped on the ground.
When it arrived in the mail I was so excited
The envelope I held nearly ignited!
I applied the right pressure, using a tool
To ensure that a leak did not cost me my pool.
It worked, that washer, what can I say?
It should last until I carelessly toss it away.
Then I suppose I'll be back online
Ordering a washer, at least one more time.