Comes in kit form, you must slide the pieces together and glue them into place.
2/Pack

The key for how to look at these dimensions is found next to the product image above.

6mm Size: R=1/4" (6mm) H=11/16" (11mm) f=1/8" (3mm)

8mm Size: R=15/16" (8mm) H=15/16" (12mm) f=5/32" (4mm)

10mm Size: R=3/8" (10mm) H=7/8" (22mm) f=3/16" (5mm)

12mm Size: R=15/32" (12mm) H=7/8" (22mm) f=1/4" (6mm)

Assembly Images