We've got an old 1980's era shower and bathtub which used to feature a shower head that could be height-adjusted by sliding it up and down a 2 foot rail. Great for tall and young folk. 

Unfortunately the mechanism that attached the shower head to the rail was fragile, made of very old acrylic-like material and would frequently break. Additionally, the shower head was very old and dated. 

We upgraded to a “ NERDON 12'' High Pressure Rainfall Round Shower Head Combo, Stainless Steel Handheld Shower Head ” and decided to use the existing rail with the handheld shower head. 

This print bridges the gap between the ‘new’ included holster and the existing rail. 

Pretty niche! 

Looking back, should have added room for recessed nuts.