Maxim Enterprise Inc Expansion Track Pack, 13-Piece Each Expansion Track Pack comes complete with 13 pieces of hardwood train track Made from 1% hardwoods (8) 6" pieces curve track. (1) 2" F/F connector. (1) 2" M/F connector. (1) 2" M/M connector. (1) 4" piece straight track. (1) 6" piece straight track Compatible with Thomas and Friends Wooden Railway; Brio and other fine Wooden Train Sets and Accessories Backed by Maxim Enterprises product lifetime guarantee