Hot stone heater This compact stone warmer has a volume of around 5.7 litres and can hold up to 40 to 50 massage stones. The automatic temperature control allows you to maintain a constant, even temperature so your stones are always ready to use. This hot stone heater has an electronic display for monitoring the water temperature. It comes with a wooden spoon for easy retrieval of hot stones. Composition :Rust-proof stainless steel shell/double enamelled metal inner lining/aluminium alloy lid....