10 x Firmopress 16mm gerade Kupplungen. Presssitz Typ U. PPSU. BFB57010
10 x Firmopress 16mm x 16mm equal couplers. The part number is BFB57010. Brass Compression Fittings. Plastic Waste Fittings. MDPE Water Pipe Fittings. These are press fit fittings and require a special tool to make the joint.