Hey DIYers and makers, if you're working on a 3D printer project or setting up pneumatic tools, these little fittings are super handy. This is a pack of 10 straight pneumatic connectors. They have an M10 thread (that's the metric size) and use a super simple \push to connect\ design for PC4-01 sized tubing – that's the standard 4mm outer diameter stuff. You just push your polyurethane or nylon tube into one end, and it locks in place with a solid, leak-free seal. No need for extra clamps or sealant. The body is made from plated copper, so it's sturdy and resists rust much better than plain steel. The other end has the M10 male thread to screw into your manifold, cylinder, or whatever your setup needs. They're small, easy to install, and even after the tube is in, you can usually swivel it to get the angle just right. Perfect for organizing your air lines cleanly and reliably. A great value pack for your workshop.