The injection-molded STJ Precision Seal is unique. Besides fitting PumpToy's large cylinders, it brings a variety of advantages to the simple and inexpensive Sun Tea Jar pump. With this seal, you can have a pump that is as effective and more comfortable than any standard two-stage cylinder, for a total investment of LESS THAN $40.00! PumpToys also makes an STJ Conversion Kit that will allow you to convert a Sun tea jar to a pump in one minute.
To learn how to make a Sun Tea Jar into a basic pump cylinder for less than $10, look at the Making an STJ Pump article in our library.
This seal will fit the common STJ, and all PumpToy's combination cylinders- the ASTJ, the LongJohnny, and the BullMaster. It will also fit other straight-rim cylinders where the rim is 1/4" or less in thickness, with openings from 3-3/4" to 4". If you have questions about fitting- please inquire before ordering! Please note that petrochemical based lubricants are not compatible with Precision seals, and are also damaging to acrylic cylinders. We recommend only GLYDE, a natural vegetable-based lube designed specifically for pumping.
International customers, see our International Shipping Page for details about delivery to your country.