This is the Highland STA Single Tank Adapter
Features:
- 14 gauge (.074/1.9 mm) 316 grade stainless steel
- A quick, easy way to mount a single cylinder to a backplate and harness
- Attaches to cylinder with two cam bands
- Center-to-center distance of 11"
- Includes hardware
- Weight: 1 Pound
For divers who frequently switch between double tank and single tank rigs, Highland by XS Scuba's Single Tank Adapter is a convenient way to attach cam straps to a hard metal back plate that does not have tank band slots."