✔30 pieces per pack, each size 21cm*7cm, can be cut size to meet your needs. ✔Strongly bonded, safe, non-toxic and waterproof. water and light resistant, high and low temperature resistance. ✔The trap uses the natural behavior of flies, which are attracted to heat and light sources and therefore like to stay in the window. Flies are retained by the insect trap ✔Please clean the surface of the window before use to ensure that there is no dust on the window. Tear off the double-sided thin paper on the back and stick it to the window. Then remove the protective paper from the front ✔If you have any questions, please contact us. We will give you a satisfactory answer within 24 hours.