Refill for Overnite Flea Trap. Trap pesky fleas and flying insects without the use of harmful insecticides! Fleas are drawn into the Over Nite Flea Trap built in light, and they get stuck inside and never come out. Photo cell night light turns on automatically as darkness falls. Fits standard wall outlets. Non-toxic, pesticide free. UL listed. 5 1/2' x 10'. Refill.