Compact Japanese-style brass radiator filler neck supplied complete with a 1.4 bar pressure cap, ideal for custom cooling system builds. This small Japanese-style brass radiator filler neck is designed for applications where a reduced-size neck is required. Manufactured from brass for excellent solderability, it is ideal for custom builds, restorations, and compact header tank installations. Ideal for custom radiator and header tank builds where a smaller filler neck is required. Enjoy a smooth checkout process. Please ensure the dimensions and pressure rating are correct for your application before ordering. We are at your side both before and after the purchase with words and deeds. Contact us using the eBay contact form an.