RV Channel Trim. You can also buy it at any RV dealer that has a parts dept. It's all the same no matter what brand RV you have. It comes in black also. When you put the new one in, put a little caulk on each end to hold it in place.
Chuck D.
“Adventure is just bad planning.” - Roald Amundsen
2013 Jayco X20E Hybrid
2016 Chevy Silverado Crew Cab Z71 LTZ2
2008 GMC Sierra SLE1 Crew Cab Z71 (traded)