What equipment is necessary for physical therapy?

Alot. There are many thousands of different pieces of physicial therapy equipment needed depending on the condition being treated. There are many different companies that specialize in this type of equipment. Try your favorite search engine for an online search of providers of these devices.
Depends. Equipment can range from simple theraband to elaborate traction equipment.

Related Questions

Please describe a good physical therapy equipment?

No equipment. The best physical therapy involves posture and activity reeducation, stretching, strengthening and working on the floor, with mars balls and rubberbands. You don't need any fancy equipment, just a good therapist.