Lub raj peb ceg ntawm lub pas kub telescoping muaj qhov yooj yim tshaj plaws rau tus neeg ua haujlwm vim tias lawv tso cai rau lawv ua ntau yam haujlwm niaj hnub los ntawm theem hauv av. Lub qhov kawg universal ntawm qhov seem sab saum toj insulated txais ntau yam khoom siv, yog li tus neeg ua haujlwm tuaj yeem txiav cov hloov pauv, hloov cov raj txiav thiab rov kaw, tshem cov npog ncej txiav cov ntoo, hloov cov teeb thiab ua tiav ntau lwm yam haujlwm saum toj kawg nkaus. Lub raj peb ceg seem tau pom raws li cov duab hauv qab no, qhov kwv yees li peb ceg arc yog qhov yooj yim tshaj plaws ntawm tes tuav. qhov kwv yees li peb ceg duab tuaj yeem zam kev swb axial thaum lub sijhawm ua haujlwm torsional. Piv nrog rau lub raj puag ncig ib txwm muaj, nws ruaj khov dua, yooj yim txuas rau qhov ua haujlwm thiab yooj yim ua haujlwm.