CUPC /UL walk in bathtub with outward swing door , water pump.air pump,heater are ok with good armrest and rubber pillow ... and stainless steel stand to support the tub . 2. The walk in tub is outer opening door ,the lock use high ... be avialable for the UL water pump ,air pump ,heater ,Ozone , thermostatic faucet . 4. The walk in tub choose copper faucet ,cold ...