Mfg.,Part No.,Desc.,Units,ID,OD,Length,Material,CG,Mass Units,Mass,AutoSize BalsaMachining.com,EB13-P,.516x.376x.25thk paper (mini eng thrust ring),in.,.376,.516,.25,Paper,,oz.,0,1 BalsaMachining.com,EB18-P,.708x.542x.25thk paper (fits T20 tube),in.,.546,.708,.25,Paper,,oz.,0,1 BalsaMachining.com,EB24-P,.946x.736x.25thk paper (fits T50 tube),in.,.736,.946,.25,Paper,,oz.,0,1 BalsaMachining.com,EB29-P,1.137x.977x.50thk paper (fits T52H),in.,.977,1.137,.5,Paper,0,g,0,0