The Doff Spider; Crawling Insect Killer is a 300ml solution that effectively kills spiders and other crawling insects. It can also be used as a repellent, providing an added layer of protection against unwanted pests. The product contains tetramethrin and permethrin, two active ingredients that work together to provide a reliable solution for pest control. With its compact size and easy-to-use formula, this product is a convenient option for homeowners looking to manage crawling insect populations.