i wanted to add reinforced glass windows however they don't show here is the code 

"Reinforced Glass Window ": {
      "buy": "80",
      "img": "https://rustlabs.com/img/items40/wall.window.glass.reinforced.png",
      "item": "wall.window.glass.reinforced",
      "sell": "70"
    },​

and the listing for it

 "Reinforced Glass Window",​

but it refuses to show i have checked mulitple time and it's correct format

This is how I have it working:

      "item": "Reinforced Glass Window",

do u have it in the shop part below under either BUY or Sell 
if not it wont show.

i did as snivel suggested and works