This carriage assembly is made to replace the carriage on compatible Genie belt and chain drive operators that have a rail for a 7-foot high garage door. The carriage attaches to the bullet on the belt and when engaged together will operate to open and close the garage door. 

• Compatible with Models: 1028, 2028, 3020H, 3020H-B, 3120, 3022, 3024, 3042, 4022, 4024, 4042, SilentMax 1000, SilentMax 1200, IntelliG 1000, IntelliG 1200, ReliaG 650, ReliaG 850
• Straight door arm is attached and included (for the 7-foot high garage door)
• Genuine Genie replacement part 
• Installation instructions included