This is a bearing kit by Avid RC for the Tekno EB48.3 & ET48.3 & MT410.
Includes
10 x 8x16x5 Revolution
4 x 13x19x4 Revolution
4 x 6x10x3 Revolution
4 x 5x8x2.5 Revolution
2 x 5x11x4 Revolution
2 x 5x13x4 Revolution