The 2001 Mattel Hot Wheels Custom Karts Shifter Series 55185 Kart #1 of 4 is a diecast toy vehicle made of plastic, featuring a unique design inspired by custom karts. The vehicle, part of a set of four, showcases a vibrant red and black colour scheme, reflecting the branding of Mattel and Hot Wheels. Released in 2001, this collectible item is a must-have for enthusiasts of contemporary cars and toy vehicles, offering a fun and imaginative play experience for children and collectors alike.