This is an optional Vanquish Products VS4-10 Pro VFD Battery & Electroncis Tray, is a replacement for the VS4-10 Pro, but will also allow owners of the VS4-10 Origin and VS4-10 Chassis kit (VPS10130), to use the VFD Hurtz Dig (VPS01360/VPS01361), with the VFD transmission. Note: Hardware and standoffs are not included. Standoffs are included with the VFD Transmission Skid Plate Set. Includes: (1) Full size battery tray (2) Side electronics/battery tray