The Bintel 2 inch Barrel has a standard SCT male thread (2”x 24tpi), is made of Aluminium, the inside is painted matt black and is threaded (M48 x 0.75) so it can take most brands of 2 inch filters.
If you have a Bintel 2inch SCT Mirror Diagonal and want to use in a refractor, then you simply unscrew SCT fitting and screw the 2” Barrel in its place. It can also 
be used as a replacement Barrel on Bintel /GSO 2”eyepieces.
SKU: FF060