Our Piston Washers all use a 7/32″ center hole. They are carefully punched from the highest grade cork. Typically, these washers will be used underneath a felt as an upstroke adjustment on a valve instrument.
What is “Batch Built”?
Batch Built is a description we apply to our machined tools that are periodically made in batches.
Each time we make a new batch, the product’s design, function, specifications, and materials are reviewed with the design and production teams. We are constantly improving our tools and finding ways to make them more economically.
Although we work hard to ensure our essential tools, pads, parts and supplies are always available, Batch Built tools are not in stock at all times.
How can I order Batch Built tools?
If a Batch Built tool is out of stock it cannot be ordered, but you can enter your email address on the product page in the field “Email when stock available” and click “Notify Me”.
We don’t want to hold up orders that include Batch Built items if they cannot be delivered, particularly if those items are not yet on our production schedule and have no ETA.
Which items are Batch Built? Click here to see a full list of Batch Built tools.
