Check the listing for details. K&M 18866 Low-Action Slide Set B (Shipping Return). Color: see description, Condition: New. Listed at 57.10 USD. The extendable support arms for the »Spider Pro« keyboard stand are the ideal extension for demanding keyboard players who are looking for maximum flexibility, stability and ergonomics. Developed for professional use, these additional 15° inclined support arms enable a comfortable playing position and an optimal view of your instrument - perfect for the stage, studio or rehearsal room. Thanks to the variably adjustable support width of 670 to 980 mm and a flexibly adjustable support depth of 290 to 470 mm, a wide variety of keyboard models can be positioned safely and precisely. The integrated mounting bracket ensures quick, stable installation on the »Spider Pro« keyboard stand, while the 15° tilt enables a particularly ergonomic setup. Shipping returns: These items were returned for va.