The Thomas 945350 Post Extension Kit includes two support posts to increase headroom between the tray and support plate of the Thomas Multi-Tube Vortexer (sold separately). It includes an 18.31" long post and a 21.25" long post.
Thomas Scientific manufactures instruments, equipment, supplies, and chemicals for laboratory and scientific applications. The company, founded in 1900, is headquartered in Swedesboro, NJ.