| Specifications | IO-45HD | IO-610HD | IO-810HD | IO-815HD |
| Price | $470 plus shipping | $650 plus shipping | $870 plus shipping | $930 plus shipping |
| Tower Height | 4.2 feet (50 inches) | 6 feet (72 inches) | 7.9 feet (95 inches) | 7.9 feet (95 inches) |
| Shipping Weight | 39 lbs. | 49 lbs. | 62 lbs. | 74 lbs. |
| Base Width (to outer edge of leg) | 25 inches | 27 inches | 32 inches | 32 inches |
| Maximum Wind Load at 80 mph | 13 sq. ft. | 12 sq. ft. | 12 sq. ft. | 15 sq. ft. |
| Max. Weight: Antenna + Rotor + Mast |
200 lbs. | 200 lbs. | 200 lbs. | 250 lbs. |
| Tower Top Width | 5 inches | 5 inches | 5 inches | 5 inches |
| Rotor Plate Location from Top | 38 inches (bottom shelf) |
40.5 inches (bottom shelf) |
40.5 inches (top shelf) |
63.5 inches (bottom shelf) |
| Maximum Mast Diameter | 2.5 inches | 2.5 inches | 2.5 inches | 2.5 inches |
| Maximum Mast Extended Length | 7 feet (84 inches) | 7 feet (84 inches) | 7 feet (84 inches) | 7 feet (84 inches) |
| Rotor Mounting Options | Yaesu Series | Yaesu Series | Yaesu Series | Yaesu Series |
| Thrust Bearing Mounting Options | Yaesu GS-065 | Yaesu GS-065 | Yaesu GS-065 | Yaesu GS-065 |
| Fixed (non-rotating) Mast Option | Mast Clamp Set | Mast Clamp Set | Mast Clamp Set | Mast Clamp Set |
| Leg Material | 6061-T6 Alum (3/16″ thick x 2″ angle) |
6061-T6 Alum (3/16″ thick x 2″ angle) |
6061-T6 Alum (3/16″ thick x 2″ angle) |
6061-T6 Alum (3/16″ thick x 2″ angle) |
| Foot, Shelf and X Brace Material | 5052-H32 Alum (3/16″ thick x 2″ formed) |
5052-H32 Alum (3/16″ thick x 2″ formed) |
5052-H32 Alum (3/16″ thick x 2″ formed) |
5052-H32 Alum (3/16″ thick x 2″ formed) |
| Assembly Hardware | 5/16″-18 18-8 stainless steel |
5/16″-18 18-8 stainless steel |
5/16″-18 18-8 stainless steel |
5/16″-18 18-8 stainless steel |
| Foot to Leg Hardware | 3/8″-16 18-8 stainless steel |
3/8″-16 18-8 stainless steel |
3/8″-16 18-8 stainless steel |
3/8″-16 18-8 stainless steel |
| Nylon Locknuts | Yes | Yes | Yes | Yes |
| Climbable | Yes – w/ tower climbing belt or harness |
Yes – w/ tower climbing belt or harness |
Yes – w/ tower climbing belt or harness |
Yes – w/ tower climbing belt or harness |