SkeeterVac Fine Tune Biting Insect Lure Replacement QUALITY INGREDIENTS - Uses octenol to lure mosquitoes in for extermination. COMPATIBLE - With all SkeeterVac models. REPELLENT FORMULA - Attracts most kinds of mosquitoes and kills them. MADE TO LAST - Lasts up to 60 days with a time-release formula. EASY TO INSTALL - Simple installation.