Conical allura, kuma aka sani da ƙarfafa allura, shi ba kawai yana da dukan halaye na triangle allura, amma kuma yana da mafi girma lankwasawa karfi, mafi girma elasticity, iya jure mafi girma needling karfi, allura lalacewa-resistant, dogon sabis rayuwa, don haka zai iya inganta shigar azzakari cikin farji.
Kewayon zaɓi
• Girman allura: 20, 23, 25, 32, 36, 38, 40, 42
• Tsawon allura: 3 ”3.5″ 4″ 4.5″ 4.8″ 6″
• Siffar Barb: G GB B
• Sauran siffofi na sassan aiki, lambar injin, siffar barb da tsayin allura za a iya keɓance su