High Terpene Full Spectrum Extract from High Voltage Extracts in BC are some of the highest-end premium cannabis extraction available on the market. HTFSE 95% THC is the preservation of all available terpenes maintained from harvest to vaporization High-terpene full spectrum extract (HTFSE) is a highly refined concentrate that captures the pure terpene essence of the cannabis flower. Typically Full Spectrum Terp Sauce will contain about 50% Cannabinoids 20-30% Terpenes and 20-30% other trichrome cannabis biomolecules.