The present investigation was conducted to study the effect of both the domestic designed roller gin stand extractor-feeder in conjunction with the domestic designed (modified) seed grid on various aspects of fiber quality for three cotton cultivars namely; Giza 89, Giza 83, and Giza 91 (G+1/8 grade). The results obtained indicate that using the extractor-feeder conjoined with the seed grid No. 2 of the dimensions of 5 mm. finger width, 11 mm. spacing between fingers and 66.9% spacing area exhibited the highest lint grade, upper half mean length, uniformity index, and fiber reflectance percentage, while the lowest ones were obtained as a result of using the hand feeding method with the seed grid No. 1 of the dimensions of 9 mm. finger width, 9 mm. spacing between fingers and 48.5% spacing area (control treatment). However, using the extractor-feeder with the grid No. 2 exhibited the lowest lint percentage, non-lint content, short fiber percentage, and fiber yellowness, while the highest ones were obtained as a result of using the control treatment. The improvements occurred in lint grade as a result of handling seed cotton by the extractor-feeder was 3.9%, raised to 4.1% as a result of using the seed grid No. 2, while the improvement in lint grade resulted from using both the extractor-feeder conjoined with the seed grid No. 2 reached to 4.9%. Thus, it could be concluded that using the extractor-feeder with the seed grid No. 2 significantly preserved the upper half mean length, while improved the lint grade, fiber length uniformity index, and reflectance of lint to light percentage, and decreased the lint percentage, non-lint content, short fiber percentage, and fiber yellowness. Therefore, it could be said that using the nominate gin stand extractor feeder conjoined with the seed grid of the total high spacing area and the widest space between the grid fingers resulted in improving the ginned lint quality. *Designed By M.N. El-Awady, M.M. Youssef and H.H. El-Feky, 2002. **Designed By M.M. Youssef , 1994.