The heater interface diameter is 16mm (0.63 inches)
Size: 22cm*9cm*8cm
Compatible with all machines that use coolant
Pump life: 5000 hours
VVKB Engine Heaters are all Built-in pump
PS: If you are purchasing a product, please do not fill in the address with "PO BOX", but fill in the detailed address, because the address with "PO BOX" cannot be sent by UPS or FedEx. Thanks in advance:)