Eppendorf Flat Cap Strips (8-strips), 10 x 12 pcs. from Eppendorf | Biocompare.com
PCR Cap Strip | Azenta Life Sciences
BANG Strip Cap Gun Caps
Amazon.com: InstaTrim Corner & End Caps - Six Black 3/4" Wide Caulk Strip Corner and End Pieces - Finishing Caps for Corners & Exposed Ends - Paintable : Tools & Home Improvement