The minimum threshold width 2 3/8"Adapt is a Semi-Frameless hinged bi-fold shower door that is perfectly designed for todays contemporary trends. Its 72 in. tall double-panel hinged design is comprised of thick, tempered 1/4 in. (6 mm) ANSI Z97.1 clear tempered glass with professionally applicated water-repellant, hygienic and stain resistant glass coating. The ES-DIY bi-fold shower door is available in a wide array of width options with multiple desirable hardware finish options, to match your bathrooms interior design and layout perfectly. And it is reversibly engineered for either left or right handed installation complete with vertical shower handles for getting in and out of your shower with ease, and provides up to 3/4 in. of width adjustability for different widths in shower rooms.30 in. to 31.5 in. W x 72 in. H Semi-Frameless bi-fold shower doorThick, premium 1/4 in. (6 mm) clear tempered glass tested and certified to ANSI Z97.1 standard and SGCC certified3/4 in. W adjustability for different wall (including non-vertical walls) spacing in shower roomsFeatures a vertical stainless-steel handle thats strong and antisepsisLift pivot for easy and quiet closing and opening without scratching the floorFlexible hinges and shaft the shaft can rotate angle 180anddeg;, rotating inside or outsideReversible installation for right or left-hand door openingLayer of easy-to-clean paint by Adapt protective glass coating (no stains)Full-length clear seals included to prevent leakageVery durable, passed 20,000 push-pull testsAll reference measurements should be based on a finished openingUse a sturdy honeycomb box to transport the