This is the venerable M2 mount head combined with the TA surveyor's tripod which is much more stable than import aluminum tripods. The tripod comes with the appleply tray that merely drops into place. Also included is the MEC2 column which is needed to attach the mount to the tripod and elevate it for use with telescopes up to 115mm in aperture. This packge also includes the TP010 Vixen-type rail making it a complete mount package. Just add any Stellarvue telescope and you are good to go. Capacity of this system is more than 20 pounds. We recommend this for our 115 mm and smaller refractors as a lightweight and extremely stable system. No counterweights, you merely take the telescope and munt outside as a unit and begin observing. Much lower damping time than the one arm fork mounts and much smoother motion as you glide from object to object in the night sky.