Redcat Racing BS903-019 Drive Shaft Set (4 x 87.5mm), Black, 2-Piece Drive Shaft Set (4*87.5mm) 2 Pieces BS903-019 Color: Black RC Car Parts : BS903-019 For troubleshooting and warranty information please contact a Redcat Racing Customer Service Specialist at 602-454-6445 or by emailing amazonsupport@redcatracing.com NOTE: Please read the User Manual before use.