Recommended models: ka44, KA15
 
Founded in Yiwu, Zhejiang Province in 2010, Kaisu's products are mainly home fitness sports equipment, including exercise bikes, strength trainers, leisure trainers and ball sports equipment, etc., and has become a brand with a good reputation in the fitness products industry.
 
Kaisu has a wide range of tension device styles, with a total of five models, among which ka44 and KA15 are two tension devices with excellent performance and high cost performance. KA44 is a latex pedal tensioner, which is more affordable than Shuanglin 1010 and costs 22 yuan. The 1010 is a double tube, and the KA44 is a quadruple latex tube, which can meet the needs of consumers with a larger power level. The KA15 is a more common latex tube tension rope on the market, including 10 pounds, 15 pounds and 20 pounds of three tension ropes, which can be freely adjusted to the strength level, and accessories such as handles and door buckles make it also have the role of a hanging training belt, priced at 59.9 yuan.
 
However, according to the feedback of some users, the strength level of Kaisu's tension device is not accurate enough, and the durability needs to be improved, and the price of the product is lower than that of Xinyi Wanjia, Haide and other brands.