Hip lock down pads are a bright yellow plastic circular sheet coated on one side with a specially formulated glue. There is no odor, no potential for noxious chemicals in the air, soil, rock or water. Many insects that prey on plants are attracted to the yellow color, so providing coverage around the entire base of your plant provides the safest way to produce high yields. Hip lock down pads are economical, effective, entirely safe & simple to use. Hip lock down pads are ideal for use indoors or outdoors in potted plants. Hid lock down pads are available in 12 in, 6 in, 3 in, & 1-1/2 in pads.