Trico 21-13 Exact Fit Wiper Blade, 21" (Pack of 1) Pre-assembled to precisely match vehicles specific arm type No additional adapters required All metal long lasting frame Exact O.E. appearance for domestic and import vehicles. One step installation, installs in seconds 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 Pre-assembled to precisely match vehicles specific arm type No additional adapters required All metal long lasting frame Exact O.E. appearance for domestic and import vehicles One step installation, installs in seconds