This group of internal splices is broken down into two different design types.
The 00-830 splices are made of brass and can be used with certain tubes made of brass and 304 grade stainless steel they fit entirely on the inside of the tube.
The 47-830 and 49-830 splices are made of stainless steel and can be used only with certain 316 grade stainless steel tubes. They fit almost entirely inside the tube with the exception of a center ring in the middle.
View the spec sheets for the individual items for more information.