Trico 46-160 Twin Rail Refill - 400mm (1 Refill) Narrow refills fit trapezoidal 7-millimeter claw Preassembled metal twin rails for easy installation Available in 6 sizes from 15-inch to 20-inch Easy to install. These refills are manufactured to fit the original equipment wiper assembly, If this assembly has been replaced with anything other than an OE product the refill may not fit properly Narrow refills fit trapezoidal 7-millimeter claw Preassembled metal twin rails for easy installation Available in 6 sizes from 15-inch to 20-inch Easy to install