Airtac is a leading worldwide manufacturer of Pneumatic Components. Airtac employs over 8,000 people worldwide and it's pneumatic valve design is probably the most copied design in the world. On the discountairvalves website, we offer everything that is manufactured by Airtac, but we only list the products that we carry in stock. Please call us or email us for quotes on other products. Email: natvalve@comcast.net Phone: 248-366-7700 Fax 248-366-7750