Captain O-Ring - Benjamin &amp; Air Force PCP Hand Pump ORing Rebuild Kit (Polyurethane Piston O-Ring Upgrade)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Product includes a link to our printable o-ring replacement guide， making replacing your o-rings easier than ever</li><li>Includes all o-rings needed to rebuild your Benjamin/Air Force PCP Hand Pump</li><li>Includes polyurethane piston o-ring， which is better suited to handle the abrasion that destroys buna o-rings when used on the piston rod</li><li>Printable o-ring replacement guide is available at captainoring.com/manuals</li><li>Manufactured and warrantied by Captain O-Ring LLC</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51SNPljemCL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41wHzs0BQvL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51AZQ2tGfgL.jpg" noproxy>