Kit of 2 ALG15. N°1 ALG15: threaded fitting for valves in malleable steel with black cover, DN: 20 [mm], External diameter: G 1 Inch B, Internal diameter: Rp 1/2 Inch (internal thread). Cylindrical thread ISO 228/1 valve side, conical thread ISO 7/1 pipe side. Each ALG.. fitting is made up of 1 nut, 1 insert and 1 flat closure