AOD 7" Stem Garage Door Precision Rollers- Now 7" stem 12 Pack available. AOD New 7" Stem Garage Door Precision 6200z Rollers- 12) Pack 2" White Nylon- Professional Grade. Now in 7" Stem. 2" White Nylon Precision Bearing Shielded 7" Roller; Zinc Plated Stem; 100 lb rated 7" Stem now available exclusively through AOD. All orders include 1 can AOD Precision Lubricant