Had a guy show me a quick glimpse on his phone of the double disk openers on a houle manure spreader. On each shaft there was a piece that went over the seal so that manure was not splashing onto the seal all the time.  Appeared to be a white/clear plastic.  Said it came in two pieces and bolted together so you can put it on without taking the hub off.  I didn't know this guy so I don't have his number.  Wondering if anyone knows what I was looking at and who makes them. 

Thanks