Four wheel, 11 / 1 6" diameter molded delrin wheels mounted on solid aluminum block with 1018 steel axles and tru-arc ring that locks. Pendant ring of 303 stainless steel, electro-polished with integrated locking ring of 1/8" x I- 1 14" diameter delrin, one 3601 counter-clockwise turn to locked position.Protek Systems of Florida supples a high-quality, heavy-duty, simple IV Support System. The track is a large box channel style, custom fabricated to size and shape. Oval IV tracks are fabricated in one continuous piece up to 22'overall length. We offer four versatile IV Bottle Holders and one style heavy-duty four wheel IV Carrier. Designed for convenience and ease of operation, Model 3000 series' pushbutton height adjustment feature provides quick, precise changes with just one hand. Body is constructed of aluminum with a bright dipped anodized finish. Extender rod and ram's horns are electro-polished 303/304 stainless steel. Hub assembly may be positioned anywhere along the height of the extender rod. All models are available with an additional ram's horn extending from the bottom of the handle.