Based on this product's specifications, here are some alternatives and similar models
Brass reducer fitting kfa² 3/4" x 1/2" (model 944-620-15) plumbing connector
Summary description:
Brass reducer fitting kfa² model 944-620-15, 3/4" x 1/2", designed for connecting pipes or fixtures with differing thread sizes. Constructed from brass for corrosion resistance and mechanical durability. Suitable for plumbing installations, repair work and adapting pipe runs in residential and commercial water systems where conversion between 3/4" and 1/2" threads is required.