OCTENOL Refill bottle 40ml purity 99.8%! OCTENOL Refill bottle 40ml Enough to refill 20 used cartridge! OCTENOL is one of the best an attractant for mosquitoes and midges! Promotes efficiency of traps in 3 – 4 times!! we will Combine with all types of electronic traps! It is recommended to renew an attractant every 21 – 28 days. Free shipping worldwide! order delivery within the usa 3-5 working days. delivery to Europe 12-14. We constantly provide excellent customer service ! tell me how many empty cartridges you need, and I will send you the required number of empty cartridges for free. in the process of using a cartridge, a substance that attracts mosquitoes (octenol) volatilizes from it … To restore the efficiency of the cartridge, you just need to add octenol from the OCTENOL Refill Bott into the hole in the cartridge (the bottle has a convenient dispenser). To add it is necessary approximately 2 ml .. After that the working capacity of a cartridge is completely restored! if you have any questions please ask .. I’m happy to answer them ..