Biraha badan iyo xeryahooda waa in laga sameeyaa filimo khafiif ah ka hor inta aan loo isticmaalin alaabada farsamada sida elektarooniga, bandhigyada, unugyada shidaalka, ama codsiyada catalytic.Si kastaba ha ahaatee, biraha "iska caabinta", oo ay ku jiraan walxaha sida platinum, iridium, ruth ...
Akhri wax dheeraad ah