美国采购需求：定制铅笔帽，定制铅笔帽，金属铅笔帽，笔帽，铅笔配件，铅笔帽

We're looking to create a cable connector that will be applied to a pen design, aiming for a design that resembles a cable. I'm unsure about the sizing, particularly whether a connector can fit on a push pen or if it's only suitable for flat-ended pens. We'd appreciate your advice on material options that provide the best balance between cost and functionality. I have an image of the connector that I can share for reference, which should help in understanding our requirements better.