Rocketpot has different withdrawal limits for each cryptocurrency:
The minimum amount is 0.002 BTC, 0.01 ETH, 0.01 DOGE, 0.01 LTC, 0.001 BCH, 1 NEO.
The withdrawal fee is 0.0006 (BTC, NEO, BCH, LTC, DOGE, ETH, BTC).