It is important to note that not all Kubota backhoes and excavators came with these bucket teeth.
It is important that you look at and compare your bucket teeth to these pictures and dimensions.

The Kubota L35, L39, and L48 TLB units used these type bucket teeth.
Also the BH90 backhoe attachment.

Many of the late model Kubota excavators use these type bucket teeth.

The weld on type adapters can be purchased to replace broken or damaged ones or your bucket. Or if you would like to change your present system to these type teeth.
The important dimension to measure when replacing the weld on adapters is the thickness of the area the adapter will be welded onto. The “Lip Thickness” dimension shown on the adapter should closely math the thickness of the bucket area you intend to weld them to.

Lastly the One Piece bolt on type tooth assembly shown at the bottom of the page fits many Kubota backhoe models below.
B20 and B21 tractor, loader, backhoes
BX22, BX23, and BX24 tractor, loader backhoes.
Also the BH 75 backhoe attachment.