Material: PVCSpecifications:Size: as picture showPackage Included:1 x Warm Water Bag (with random plush bag)How to use the radiator:①Put hot water into a plush bag②Inject water at about 80℃ to three-quarters③Exhaust excess air and tighten the lidNote: When injecting hot water, avoid directly injecting boiling water, the most suitable is around 80℃The sealing ring at the bottom of the lid is an important part to prevent water leakage. Please do not damage or lose