Zhè gēn liánjiēguǎn shì xiàngjiāo de, yòng jiǔ le huì lǎohuà.
This connecting hose is rubber; after long use it'll degrade.
Tips
usage
Generic engineering word — used in plumbing, HVAC, engine cooling, fuel systems, even medical devices. 管 here spans 'tube / pipe / hose' in English; the material (metal, rubber, plastic) is clarified from context or a modifier like 橡胶连接管.
