Ed on lathes which turning diameter is from 300mm to 500mm. C06236, MATE360, C6240, Yangzhou Super C6241, C6246, etc. To select a right tool post for your lathe, swing over bed is not the only data to refer. Also need to know your lathe tool top slide width and lathe main motor power.
For a light duty bench lathe with 360mm(14) swing and main power less than 3KW, a smaller model E5 might be OK for work. For a middle or heavy. Duty lathe with same 360mm(14) swing and main power more than 3KW, model B2 should be better. This B2 is not a standard kit. 1x B2 tool post &locking wrench. 1 x BD25140 turning tool holder. BD25140 can hold 25MM shank(1.26 tip height) turning tool. 1 X BH32130 boring tool holder, This boring tool holder is with large V notch for round shank tool. 1 X T wrench for tool holders. Net weight: 4.4+1.8+2 KGS, Gross weight: 8.6 KGS. Some tool dealer like optimum toolmaxx name B2 model as B, SWH5-B, WB in Europe.