Jagwire lex 4mm outer gear housingjagwire shift housing is the first choice for the worlds biggest and best bicycle brands they trust jagwire to deliver high quality durable performance manufactured with lead free pvc jagwire housings meet all international standards and regulations for chemical and material content the lex housing uses linear steel strands wrapped around an inner non lubricated liner the combination of low cost and long lasting performance makes it ideal for entry level b