This drawtube spacer allows for 2″ imaging, or visual accessories to be attached to the telescope.
This will directly attach to the CDK12.5 Hedrick focuser without any additional adapters.
If you are using the CDK14 through CDK24 Hedrick focuser, or the IRF90 rotating focuser then you will require the IRF90/Hedrick focuser to 2″ accessory adapter to attach this adapter to the focuser.