They are poorly made. If your pump is designed to work with these needles, prepare to ruin the needle by taking it out. Any force pulling or shaking the needle will break. See first picture. I used them three times and they broke three times. In addition, their finish also leaves something to be desired, making it difficult for whatever you pump in to penetrate. And yes, I lubricated the needle before inserting it. Notice the uneven end in the second photo. Save yourself the hassle and spend twice as much money for half the needles.
Portzon Women'S Waist Trainer: Weight Loss, Sweat Belt, Sauna Trimmer, Tummy Toner, Lumbar Support
47 Review
Metal Frame Night Driving Glasses For Men: BIRCEN HD Anti-Glare Night Vision Glasses For Safe Driving
47 Review
Foxelli Wading Boots: Lightweight, Rubber Sole Fly Fishing Shoes For Men - Grey
47 Review
Segmented Beaded Kids Jump Rope For Exercise And Outdoor Activities - Durable And Shatterproof - Easily Adjustable And Light Weight Skipping Rope For Kids
48 Review