zenna home tension stall shower rod, 27"-40", white zenna home zenith 502w 40" twisttight stall tension rod, whitezenith corporation is america's leading manufacturer of bathroom storage and organizational products for the retail market. zenith offers a wide line of items and accessories that are both attractive and functionalzenith 502w 40" twisttight stall tension rod, white features: plastic transition collar that allows rings to glide smoothly holds more weight than the competition due to our patented twisttight technology chip and rust resistant installs in seconds adjustable tension shower rod white size 24" to 40"