$10 Bench adjustable 3D model by ReyesRicardoM. Available on CGTrader with 10973 polys and 11333 vertices. Check it out on CGHub.
MAX (Autodesk 3ds Max, filesize: 824 KB), FBX (Autodesk FBX, filesize: 522 KB), STL (Stereolithography, filesize: 536 KB)