identifcation

Hi all, I'm trying to figure out the name for this rubber strip hanging down? Also could it be easily repaired or replaced? Thanks

Recently discovered that the breather pipe coming from the right hand side of the engine (crankcase breather pipe) has a split in it. I managed to get hold of a replacement, went to fit it today and discovered the the pipe that goes down into is split as well. I'm not sure what this pipe is...