Thông số kỹ thuật: - Gồm các size: 3/4"(19mm), 7/8"(22mm), 1-1/8"(29mm),1-3/8"(35mm), 1-1/2"(38mm),1-3/4"(44mm), 2"(51mm), 2-1/4"(57mm),2-1/2"(64mm)
