Based on this product's specifications, here are some alternatives and similar models
Brass extension fitting Fitting SF52-3/4X50, male 3/4" x 50 mm
Summary description:
Brass extension fitting Fitting SF52-3/4X50 is a 3/4" x 50 mm threaded brass connector designed to extend pipe connections. Made of brass for corrosion resistance, it provides a stable mechanical join between threaded fittings or valves. Suitable for plumbing, heating and general fluid installations where a 50 mm extension is required.