Double wall telescoping outer boxes 24-3/4″ x 8-3/4″ x 57″ 275#/ect-48 – 5 pack hsc style carton can be used alone or combined with companion piece for an adjustable, 2 piece set. one inner and one outer carton required to make a set – sold separately combine with t24857indw to complete the set manufactured from 275# dw/ect-48 kraft corrugated cartons have a fol (full over lap) bottom for added strength sold in bundle quantities of 5 for help selecting the right box, click the brochure tab below.