Protect Your Family: Universal transparent gas oven knob safety covers with matching double-sided tape can perfectly prevent oil stains and accidental opening to ensure your and your family's safety. > Half Transparent:The gas burner stove knob locks are designed in high quality transparent type so that you can see the track line when the knob closes and know the food cooking process. High Quality: The gas oven knob safety cover is made of durable and high temperature resistant polystyrene which can protect the longevity of the gas stove knob and be used for a long time. > Easy to install: in just 3 steps: first disassemble the gas stove knob; second to stick the double-sided tape on the bottom of the gas stove switch protection cover; third to stick in the center and press firmly. Contents: 6 stove knob covers and 12 matching double-sided adhesive tapes for daily use and each size 6.5 x 6.5 x 4 cm, installation hole sizes 4.5 x 4.5 cm.