LBH wiper wani nau'in rufewa ne wanda ake amfani dashi a aikace-aikacen hydraulic don hana kowane nau'in barbashi mara kyau na waje shiga cikin silinda.
Daidaitacce tare da kayan NBR 85-88 Shore A. Wani bangare ne don cire datti, yashi, ruwan sama, da sanyi cewa sandar fistan mai jujjuyawa tana manne da saman silinda na waje don hana ƙurar waje da ruwan sama shiga cikin ɓangaren ciki na hanyar rufewa.