Radiator dosing funnel

If you want to put chemical (Radiadtor inhibitor) into the central heating system in your home, this is the tool you need. I found they are usually selling over £15, instead of buy one from online I designed and printed it by myself. The thread should fit most of the radiator dosing port in UK.Usage: https://www.youtube.com/watch?v=A4oWx6kZNiU Height : 140mmFunnel inner diameter: 47mmThread: ½" BSP (Male)PLATested to print out by Bambu Lab P2S