I-UL Door Closer ngumnyango odumileyo osondeleyo, uqinile kwaye kulula ukuwusebenzisa. sibonelela abathengi abahlukeneyo abahlukeneyo bekhwalithi yoMlilo oPhakathiweyo weDoor Closer kwaye bafaka kwiintengiso ezahlukeneyo zeengcango. I-Fire Resistance Door Closer yolunye uhlobo lwe-Aluminiyam Alloy Door Closer. Izinto eziphathekayo ze-UL Door Closer zifakwe i-aluminium alloy, ngoko inokugcina imilo yokuqala kakuhle. I-Heavy Duty Door Closer nayo inokugcina igudileyo ixesha elide, kungekho lula ukwaphuka, ezi mpawu zimbini zinciphisa kakhulu ukuba nokwenzeka koFire Rated UL Door Closer ibe yindala kwaye imbi. I-Fire Rated Metal Door Closer inokugcina i-lubrication ixesha elide, ikwenze kube lula ukuvula nokuvala ucango. I-Fire Rated Door Hardware igudile kwaye kulula ukuyifaka kunye nokusetyenziswa, inokukuzisela ukhuseleko oluphezulu kunye nobuhle. Ngolwazi oluthe vetshe, nceda uqhagamshelane nathi.