Speed Pfu DNA Polymerase is a hot start, high fidelity and high processivity DNA Polymerase. Speed Pfu DNA Polymerase has an extension rate of up to 6 kb/min. Speed Pfu DNA Polymerase has high extension rate, fidelity, and amplification efficiency. Extension rate is about 2-6 kb/min. Amplification of genomic DNA fragment up to 15 kb. Amplification of plasmid DNA fragment up to 20 kb.