Comparison : Item # 6061-T6ST-750-125, Aluminum Square Tubing - Series 6061-T6
Item # 6061-T6ST-1000-125, Aluminum Square Tubing - Series 6061-T6
Item # 6061-T6ST-1250-125, Aluminum Square Tubing - Series 6061-T6
Item # 6061-T6ST-1500-062, Aluminum Square Tubing - Series 6061-T6
Item # 6061-T6ST-1500-125, Aluminum Square Tubing - Series 6061-T6