After the launch of the PolySafe multipurpose polyester enclosures in 2000, the Superpolyrel 300 was phased out. Also, the Superpolyrel 400 is no longer available. With the PolySafe depth extension kit and the EH3-great depth we offer alternative solutions. As of November 1st 2007 we can no longer accept any new order for the complete Superpolyrel range. Please make arrangements for this transition.