Top loading probes of either 109 mm diameter or 50 mm diameter can be used for fast sample exchange from 300K to base temperature within 8 hours. The 50 mm probe can be mounted in the center of the plate or sidewise, in one of the 50 mm ports (up to 2). The 109 mm probe is mounted in the central port. The 109 mm probes have the largest cooling power of all similar devices, with up to 500 uW at 120 mK.