Molecular photocopying — or polymerase chain reaction (PCR) — is a quick and affordable way to copy short segments of DNA molecules. Here at LabSource, we’re the No. 1 destination for all PCR accessories — whether you’re searching for a laboratory cap, strip tube, PCR plates, laboratory sealing film and mats, heat sealers or a variety of other PCR products. If you’re having trouble locating the PCR plate films and mats or strip caps you need, our customer service team is always available to help. Order your PCR plates, tubes, caps, lab sealing film and mats, and other products today. Receive same-day shipping on many items.