Need some durable, chemical-resistant caps for bottles or containers? These black phenolic plastic caps with a PV (polyvinyl) liner are a solid, reliable choice. The size is 48/400, and you get a whole case of 48 caps, which is perfect if you're packaging products in bulk or just want to have plenty on hand for your workshop or lab. The key feature is the liner – it's a PV film stuck to a white pulp paper backing. This makes the cap really good at sealing against a bunch of common stuff like mild acids, alkalis, solvents, oils, alcohols, and water-based products. Just a heads up, they're not recommended for super aggressive hydrocarbons or bleaches. To get the right fit, just match the cap code on your container with this 48/400 code. They're simple, effective, and get the sealing job done without any fuss. The case weighs about 1.2 pounds, so they're easy to handle. Great for DIY chemical storage, small-batch crafting, or light industrial use.
