Our standard cold heads are specified to reach ultimate temperatures of 10 K. In fact, in production most of our double stage cold heads reach ultimate temperatures of slightly lower than 8 K, but this is under no load condition, i. e. the thermal load would be zero. But the customer will certainly require some residual cooling capacity at 8 K instead.
As we just phased out the only product with some cooling capacity at 8 K (i. e. the special low temperature version CP 5/100 T of our standard cooler CP 5/100), we cannot offer any cooler at present, which would have a guaranteed residual cooling capacity at 8 K at present. In other words, at present we cannot offer any cold head for this customer requirement.