Myson Premier Metric Round Top Type 21 Double-Panel Single Convector Radiator 600mm x 2000mm White 9568BTU - Screwfix
![A small plastic square on the top of a new radiator, it can slide back and forth but doesn't seem to serve any purpose. There's one on every radiator in the house A small plastic square on the top of a new radiator, it can slide back and forth but doesn't seem to serve any purpose. There's one on every radiator in the house](https://external-preview.redd.it/kVgyq5_qPKAQMVC7DAcZgoq7vBwO_NaGUWrninn0Sgw.jpg?auto=webp&s=7aa6a59c873b4513f7fb6699adf2dd6a844607d9)
A small plastic square on the top of a new radiator, it can slide back and forth but doesn't seem to serve any purpose. There's one on every radiator in the house
![Eastbrook Type 11 Flat Panel Radiator 500mm x 1200mm - Gloss White, available at the best price from Low Cost Plumbing Supplies Eastbrook Type 11 Flat Panel Radiator 500mm x 1200mm - Gloss White, available at the best price from Low Cost Plumbing Supplies](https://www.lowcostplumbingsupplies.co.uk/media/fishpig/webp/catalog/product/cache/dec253e82e2c337aa46e85b421a10f9e/e/a/eastbrook-type-11-flat-panel-radiator-gloss-white.webp)
Eastbrook Type 11 Flat Panel Radiator 500mm x 1200mm - Gloss White, available at the best price from Low Cost Plumbing Supplies
![Myhomeware Radiator Air Flow Adapter Heat Diverter Booster Radiator For Single (For 500mm rads, 450mm actual size) : Amazon.co.uk: DIY & Tools Myhomeware Radiator Air Flow Adapter Heat Diverter Booster Radiator For Single (For 500mm rads, 450mm actual size) : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/41j1au2hZgL._AC_UF350,350_QL80_.jpg)
Myhomeware Radiator Air Flow Adapter Heat Diverter Booster Radiator For Single (For 500mm rads, 450mm actual size) : Amazon.co.uk: DIY & Tools
![Kudox Steel Panel Radiator Type 33 Triple Panel Triple Convector 600mm x 1600mm - Heating Bargains Online Shop Kudox Steel Panel Radiator Type 33 Triple Panel Triple Convector 600mm x 1600mm - Heating Bargains Online Shop](https://www.heatingbargains.co.uk/wp-content/uploads/2016/10/230.00-kudox-steel-panel-radiator-type-33-triple-panel-triple-convector-600mm-x-1600mm-300-p-1.jpg)