The Thermo Shandon Pathcentre can hold up to 306 cassettes or 1224 cassettes for the entire system. It also has a heated reaction chamber, four heated wax baths, reagent bottle storage shelves and an accessory drawer. The Thermo Shandon Pathcentre can hold up to 306 cassettes or 1224 cassettes for the entire system. It also has a heated reaction chamber, four heated wax baths, reagent bottle storage shelves and an accessory drawer.