1.25" is a nearly universal telescope eyepiece diameter. However, some manufacturers have tried to make their own eyepiece sizes; maybe to force brand loyalty, maybe it was cheaper.
0.965" is one of these eyepieces sizes, and they are now quite difficult to come across since they weren't widely adopted.
This set includes one of each 6mm, 12.5mm, and 20mm 0.965" eyepieces. They are not the highest quality, but certainly better than a telescope with no eyepieces.