This is a Team Losi Racing 8IGHT-X Carbon Front Arm Inserts, intended for use as an optional part with the 8IGHT-XE Race 1/8 Electric Buggy and 8IGHT-X 1/8 4WD Competition Nitro Buggy kits (TLR04007, TLR04008) and as a replacement part with the 8IGHT-X 1/8 4WD Elite Competition Nitro Buggy kit (TLR04010).