Carbon fiber PLA. Complete LCG battery tray for the trx4 sport. replaces the top heavy battery tray from Traxxas and gets your battery low and between the rails for better balance and lower center of gravity. Includes mounting plate for the ESC and the Receiver but you are not required to use these as they are optional parts. Comes with all hardware needed to mount. replace factory screws with the longer ones that are included. you must provide your own battery straps, sorry i can not 3d print those.... (this does not work if you installed the 2speed transmission) this is for the sport only.....Authorization to Sell 3D Prints Designed by Spare-Time Hobbies I am an Authorized Printing Partner for Spare-Time Hobbies. I am exclusively Authorized to sell prints on E-Bay for all designs sold by Spare-Time Hobbies. My authorization code is STH-EB101. Concerns should be direct to Adam at Spare-Time Hobbies "Email will be provided after the sale per E-Bay rules." Disclaimer: Due to the nature of 3D printing, items may contain visual blemishes. 3D printed product may require some trimming, drilling and painting for optimal visual appeal and proper fit; similar to what you would expect to do with modeling parts. 3D printed parts are formed at or above 200 degrees Celsius. Do not store in high temperature areas or in direct sunlight. Warranty: If your 3D Printed product becomes damaged within the first 30 days, one set of individual replacement parts are available upon request. Please e-mail a photo of the damaged part for review to determine if design or print was the cause of damage. After the first 30 days, replacement is at the discretion of the 3DPrinting Partner.