| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | Gas-checks in British RML heavy guns - Summary Table |  |  |  |  |  |
| 3 | Model | Rifling | Rifling | Stud/Gas-Check Combinations | Stud/Gas-Check Combinations | Stud/Gas-Check Combinations |
| 4 | Type | Grooves | Studded without Gas-Check | Studded with Attached Gas-Check | Studless with Automatic Gas-Check | - |
| 5 | 17.72 inch | Polygroove | 28 | - | - | Y |
| 6 | 16 inch | Polygroove | 33 | - | - | Y |
| 7 | 12.5 inch | Woolwich | 9 | - | Y | Y |
| 8 | 12 inch 35 ton | Woolwich | 9 | - | Y | Y |
| 9 | 12 inch 25 ton | Woolwich | 9 | - | Y | Y |
| 10 | 11 inch | Woolwich | 9 | - | Y | Y |
| 11 | 10.4 inch 28 ton | Polygroove | 21 | - | - | Y |
| 12 | 10 inch 18 ton Marks I & II | Woolwich | 7 | - | Y | Y |
| 13 | 10 inch 12 ton Marks III & IV | Polygroove | 32 | - | - | Y |
| 14 | 9 inch Marks I-V | Woolwich | 6 | - | Y | Y |
| 15 | 9 inch Mark VI LS | Polygroove | 27 | - | - | Y |
| 16 | 8 inch 9 ton gun | Woolwich | 4 | - | Y | Y |
| 17 | 8 inch 70 cwt howitzer | Polygroove | 24 | - | - | Y |
| 18 | 8 inch 46 cwt howitzer | Woolwich | 4 | - | Y | Y |
| 19 | 7 inch 7 ton | Woolwich | 3 | Y | - | - |
| 20 | 7 inch 6.5 ton | Woolwich | 3 | Y | - | - |
| 21 | 7 inch 90 cwt | Woolwich | 3 | Y | - | - |

Question: How many Woolwich rifle models are there and what are the ranges in size? 
Answer: There are 11 models of Woolwich rifled guns, ranging from 7 inches to 12.5 inches.