Hello

My old sprayer broke and I am looking for a deal on a new one. I have found two on sale but I do not understand what the difference is between FPM and EPDM. Does anyone know?

Here are the two sprayers, the first is discounted to £30 and the second is £40, both on here https://www.pricedropdonkey.com/cheap-home-garden/garden-tools-deals