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Sample Supply Precast Connection 16mm 22mm 32mm 40mm Splice Sleeve 45# Carbon Steel Full Grout Rebar Coupler, Find Details and Price about Grout Sleeve Building Material from Sample Supply Precast Connection 16mm 22mm 32mm 40mm Splice Sleeve 45# Carbon Steel Full Grout Rebar Coupler - Liaocheng Jinyuyuan Metal Products Co., Ltd.