ThermalSeal RT films combine an optically transparent polyester film with a strong, ultra-mooth, non-absorbing, non-fluorescing medical-grade adhesive for superior performance in real-time PCR applications. In place of the customary paper backing, ThermalSeal RT have a plastic liner which is easily removed before use and contributes smoothness and extreme optical clarity to the adhesive. Dimensions 3.125 by 5.625 inches for sealing PCR plates. Length between the perforations with end-tabs removed is 4.80 inches. Brilliant ultra-high optical clarity. 2 mil thickness. Heat resistant, recommended for temperatures from -40º C to +120º C. Certified DNase-, RNase-, and nucleic-acid- free. 100/pk