Metabox is not just a runner but an entire drawer system of components that make building drawers easier while adding value high quality construction and coordinated accessories. Unique to the design is a three-sided drawer with metal sides functioning as runners. These sides are screwed to the bottom and back panels requiring no glue or joinery. Blumatic self-closing action and ability to customize drawer organization are just a few of the many features that make Blum Metabox the most versatile and complete drawer system available today!. Metabox Quick-Fix C-15 Version drawers can be namually assembled in a matter of minutes. This technique can be achieved by pre-drilling with simple manual boring templates a Blum machine or a line boring machine. C-15 Metabox High. Color: White. Size: 22. 6 side height. 1/2 side clearance. 3/4 Extension High Side.