HYP 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. HYP Lock Down Pads are economical, effective, entirely safe and simple to use. HYP Lock Down Pads are ideal for use indoors or outdoors in potted plants. HYD Lock Down Pads are available in 12 in, 6 in, 3 in, and 1-1/2 in pads.