Includes (1) Ball Bearing. New, Bulk Packed. Genuine OEM Replacement Part # 330003-05. Consult owners manual for proper part number identification and proper installation. Please refer to list for compatibility. Compatible with the Following:Porter Cable: 314,314H,2610,2611,2614,2615,2620,2621,6302,6614,6615,7551,7556,7563,7564,4630,4634,4640,6602,6603,6604,6605,548,725,726,7349,7499,309,3092,556,647,7301,738,690,6902,690LR,690LRVS,691,6912,694917,330,332,333, Highly rated. Meets industry standards. Ideal for professionals. Ideal for professionals. Top performance. Meets industry standards.