SIP

Manhole covers of metal; Metal pipe fittings; Fittings of metal for pipes; Metal castings for construction and municipal use; Iron fittings for ducts; Hubless cast iron pipe for use in soil; Metal pipe couplings and fittings for hubless, cast iron pipe; Metal expansion joints for iron piping and ducting; Metal joint restraints for ductile iron pipes; Metal fasteners, namely, joint restraints for PVC pipes; Metal fasteners, namely, joint restraints for iron duct piping