.product_table tr:first-of-type {
  font-weight: bold;
}

.product_table td:first-of-type {
  width: 300px;
  text-align: left;
}

.product_table td {
  width: 99px;
  padding-bottom: 15px;
  font-size: 14px;
  text-align: center;
}

.specs_table{
  width: 100%;
}

.specs_table tr:first-of-type td{
  padding-top: 0;
}

@media (min-width: 750px) {
  .product_table td:first-of-type {
    width: 400px;
    text-align: left;
  }
}