Contents include four (4) additional Avid Fusion™ Sleeves that fit on the Avid Fusion™ Or the Avid Hygiene Handpiece™ Motor. (The standard system comes with four (4) sleeves.) 
This is an accessory item. You must purchase at least one (1) Avid Fusion™ Hygiene Handpiece System (SKU 28.5.1) or the Avid Hygiene Handpiece System (SKU 25.5.1) prior to purchasing extra sleeves.

If you purchase one Avid Fusion™ Hygiene Handpiece system (28.5.1) and one package of the Avid Fusion Hygiene Handpiece™ Sleeves (28.5.2) per operatory, you will have the equivalent of eight (8) hygiene motors at a cost of less than $285.00 per effective handpiece.