Swix HF 5X is a high powered high fluorocarbon wax for cold temperatures. The 5 has a much lower melting point compared to the HF 4. Use the HF 5X as a wax alone or as a base for Cera F Powder. Recommended Iron Temp 311F (150C), Easy to Work With, Snow Temperature: Cold, Actual Temperature Range: 18 to 7 F (-8 to-14 C), Wax Form: Block, Composition: High Fluorocarbon, Size: 40g, Model Year: 2020, Product ID: 363885, Model Number: HF05X-4, GTIN: 7045951823356