Review on JACO Lightning Presta Schrader Valves by Trevor Garrett

0 for 2 This is the quality I got in a box of 2 pneumo cartridges. One leaked so hard my electric pump could barely keep up. The other would not engage the Schrader valve no matter how hard I tried to push and turn the knurled ring; it just kept popping up. And yes, I made sure the ring was set to "S" (Schrader) for both. I replaced these air canisters with Ram-Pro Heavy Duty air canisters, https://www.amazon.com/gp/product/B07N9773DN. /ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1, same overhead lines, no leaks, no problems. So it wasn't the air hose and upstream equipment. I could live with a mistake from two sets, but having BOTH from a defective box is beyond the normal chances of receiving a defective product. This indicates poor quality/quality control. With such terrible quality control I would never risk a replacement. No, full refund and search for other air cartridges (ram pros mentioned above).