... an paper and post it to: Hejian Solidkey Petroleum Machinery Co., Ltd.,No.15, Yangguang Community, Beihuan Road, Hejian City ... 7/8”), 114mm,118mm(4 5/8”),120mm(4 3/4”),127mm(5”)133.3mm(5 1/4”),139.7mm(5 1/2 ... 6”),155.5mm(6 1/8”),158.7mm(6 1/4”), 165.1mm(6 1/2”)190.5mm(7 1 ... ”)215.9mm(8 1/2”),222.2mm(8 3/4”) 241.3mm(9 1/2”),244.4mm(9 5 ... (13 5/8”),349.2mm(13 3/4”)374.6mm(14 3/4”)381mm(15”),393.7m(15 1/2”),406 ...