Use the catalog when you already know the brand and pen model, or when you can match a tip listed on that model's page. Search by model name, open the product, and add each specification you need. That is the fastest path to a quotation for tips we already list.
Use a sourcing request when the tip is not on the site, the model label is unclear, or a customer only sent a photo. Attach clear pictures and the quantity you have in mind. We will identify options and tell you what we can supply.
You do not need a perfect answer before you contact us. If you start in the catalog and stall, switch to sourcing with the same photos — we will pick up from there.