inner - black & white both are available. Fitting is good. Specially for Furniture pipes Fitting is push fit available 1" Square inner , 1" Round inner, 3/4" Round inner , 3/4" square inner 1.25" square inner & other sizes also availablemore...
Threaded joints probably represent the oldest method of joining piping systems. Threaded fittings are mainly used for small pipe diameters (Small Bore Piping); generally for piping whose nominal diameter is NPS 2 or smaller. Threaded piping is commonly used in low-cost, noncriticmore...