Dimensions - Adjustable length: 17 1/4" (450mm) - 27 3/16" (700mm). Please measure the distance between the ceiling and the frameless glass door before purchasing. Wide Range of Thickness - The shower door support bar is suitable for 5/16" (8mm) to 3/8" (10mm) thick glass panel, with plastic washers and head screws for perfect glass protection. Universal and Multi-directions Use - The shower door support bar rod can be rotated 180 , to accommodate different mounting positions, from frameless shower door to wall or ceiling, according to your preference. High Quality Material - Composed from 304 stainless steel, rust-proof, waterproof and moisture-proof, the shower door support bar has a long service life. Easy Installation - Just clamp on the glass, and adjust the length to attach against the wall or ceiling.