Peb ob chav disc kos valve muab cov khoom siv ruaj khov, tus nqi qis thiab kev ua haujlwm zoo heev. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau feem ntau cov ntawv thov uas xav tau kev tiv thaiv kev thim rov qab. Kuvt yog tsuas yog siv rau hauv roj av, tshuaj, khoom noj khoom haus, dej thiab tso dej, thiab lub zog hluav taws xob. Muaj ntau yam khoom siv, xws li cam khwb cia hlau, ductile hlau, stainless hlau thiab lwm yam.