The Ronford-Baker Slider is available in 7 lengths. Designed for maximized carriage travel, with a minimum height of 12cm (4.7in.). Mitchell to Mitchell fitting, with an overall width of just 25cm (10in.). The whole unit has a lockable rotation of 360° and "soft stop" adjustable buffers. We carry the 48cm (19in.), the 89cm (35in.) and the 121cm (48in.) models.