Oven Add-a-Shelf Extra Rack For Cookers 4 "Oven Add-a-Shelf" Pauline 17 August 2009 A perfect item, just what I needed. The only doubt I have about it is that I have a gas oven and the shelf sits over the flame. I think a rectangular one would of been better for me. Will it cause any problem? I take it out when it is not in use so then I have to find somewhere to store it. A note from the team Please note: Do not put into direct contact with flame or element. We'll be in touch shortly.