This is a set of two full ceramic bearings. Size: 11x5x4mm, 1150 Compatible with: Ambassadeur 1500c, 1501c, 1600c, 1601c, 2500c, 2501c, 2600c, 2601c, 3500c, Morrum, etc. Please confirm the bearings used as I don't know all the models. Please refrain from price negotiations. For multiple purchases, we will discount 200 yen from the second set onwards. Please comment. Returning customers will receive a discount, so please comment.