Hello, I'm trying to change the shape of .md-thumb but I always seem to have a circle superimposed on top.

md-slider .md-thumb {
z-index: 10;
position: absolute;
left: -25px;
top: 14px;
width: 50px;
height: 20px;
border-radius: 5px;
transform: scale(.9);
transform: scale(.9);
transition: all .4s cubic-bezier(.25,.8,.25,1);
box-shadow: 0 0 6px #00000070;
background-color: var(--color-text-primary);
}
Any Ideas on how to fix this?