8 1/2 x 8 1/2 x 48 Telescoping Outer Boxes ECT-32 20/Case: Telescoping Outer Boxes sold in bundles of 20 are designed to securely pack tall and irregularly shaped items when combined with the T8848INNER inner box (sold separately). The adjustable two-piece design provides a customizable fit for your items ensuring maximum protection during transit. Constructed from durable ECT-32 kraft corrugated material these outer boxes offer reliable strength while the full overlap (FOL) bottom provides additional support for heavy or fragile items.