Autoart Brake Caliper Card-Phone Holder Red AUTOart is pleased to announce the launch of its newest desktop accessory for office car enthusiasts. As with our precision die-cast model cars, the 6-pot design brake caliper smart phone and card holder is made of hefty and durable zinc metal, which is die-cast and finished in two colors of red and yellow. Two stainless-steel rods connecting the two halves of the caliper. The caliper also features the stainless-steel brake fluid connecting line (easily detachable when use it as a smart phone holder) and bleeding valve. The inner caliper is fitted with a stainless-steel etching plate featuring the three-pot of brake cylinders.