VWR PCR 8-Well Bubble Cap Strips Pack of 125. Combining top-notch and uncompromising quality with an affordable price the VWR PCR 8-Well Tube Bubble Cap Strips 3942-850-000/ 20170-000 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: Tubes and caps are chemically inert and autoclavable. They feature smooth thin uniform walls for accurate thermal transfer. Certified free of RNase DNase and human DNA (lot-by-lot certificates available). Caps fit precisely to ensure a positive contamination-free environment. Specifications for VWR PCR 8-Well Bubble Cap Strips: Color: Natural VWR PCR 8-Well 3942-850-000 Bubble Cap Strips Pack of 125