Can someone tell me the name of the trim piece that goes between the shower/tub lip and the white block off panel below it? I've tried searching but cannot find anything that looks similar. Mine appears to be caulked into place and I'm getting ready to do a tub replacement. The material is a rubber like bumper strip. Are these sandwiched in there and just pull out with a friction fit? Trying not to tear anything up! My trailer has a tub setup but it's the exact kind of trim piece shown in the photo above. Thanks for any help.