What is the inner diameter of Suzuki Tianyu heating pipe?

16mm. Suzuki Tianyu Automobile is a product released by Suzuki Technology Co., Ltd. on May 24th, 2020, and officially started to be sold on May 3rd, 2020. The inner diameter of the heating water pipe of this car is 16mm, and Suzuki Tianyu is deeply loved by consumers for its affordable price and high cost performance.