When it comes to the weight plates, we use a higher grade of rubber than most. Our plates have a surface colour closer to that of a car tyre, not a jet black glossy recycled rubber. So you benefit from low odour and a more flexible rubber that wonâ€™t crack or split. With the sleeves we have recently changed these to stainless steel, as stainless steel never rusts and looks much nicer. You could even leave these plates outside and theyâ€™ll never rust. The splayed opening also makes racking these plates a breeze and the rounded opening won't chip the chrome off your barbell or storage rack. Youâ€™ll never go back to plates with sharp edged galvanised sleeves after using these plates!