Mercedes Hubcentric 12mm/15mm/20mm Mix Match Wheel Spacers With Bolts (Black) This listing allows you to mix and match pairs of 12mm, 15mm 20mm spacers so that you can get exactly what you need. You also have the option to include bolts if required - both OE (Radius) fitment and Aftermarket (Taper) fitment to replace existing bolts and accomodate the increased hub thickness. To get a complete front and back set-up, simply select from the drop down options for the front, add to basket and then repeat a second time for the rear. Spacers are forged from a single piece of 6061-T6 aluminium, and machine cut for precision fitting. They are then coated in a black rust preventative coating. Bolts provided are high quality grade 10.9 carbon steel with cold rolled threads, .