Ƙwaƙwalwar allura, sashin aikinsa shima alwatika ne na yau da kullun, bambanci shine mu sanya sashin aikin sa na triangular ya zama rotator kamar zaren. Don a iya rarraba juriyar allura daidai gwargwado, yana iya tsawaita rayuwar allurar, kuma yana iya rage tsangwama a saman masana'anta da inganta girman saƙar allura.
Kewayon zaɓi
• Girman allura: 36 - 40
• Tsawon allura: 3 "3.5"
• Siffar Barb: G GB
• Sauran siffofi na sassan aiki, lambar injin, siffar barb da tsayin allura za a iya musamman