Piston For Thor Model 17 and Texas Pneumatic Models TX30CD-1, TX30CD-8, TX30PB-1 and TX30PB-8, Part # 43028.  This is not a stocked item for us and will be ordered or drop shipped from the manufacturer when purchased.  Typical ship time will be about 3-5 business days.  Please feel free to let us know if you have any questions.  At Piedmont Tool we understand that time is money and your tools help you make money faster, so we strive to get your item shipped quickly to minimize your downtime.  Thanks for looking and let us know if you need any other parts we may not have listed.