Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Gas-checks in British RML heavy guns
Table title:
Summary Table
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Model </th><th colspan=2 rowspan=1 > Rifling </th><th colspan=3 rowspan=1 > Stud/Gas-Check Combinations </th></tr>
<tr> <th colspan=1 rowspan=1 > Type </th><td colspan=1 rowspan=1 > Grooves </td><td colspan=1 rowspan=1 > Studded without Gas-Check </td><td colspan=1 rowspan=1 > Studded with Attached Gas-Check </td><td colspan=1 rowspan=1 > Studless with Automatic Gas-Check </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > 17.72 inch </th><td colspan=1 rowspan=1 > Polygroove </td><td colspan=1 rowspan=1 > 28 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th colspan=1 rowspan=1 > 16 inch </th><td colspan=1 rowspan=1 > Polygroove </td><td colspan=1 rowspan=1 > 33 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 12.5 inch </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 12 inch 35 ton </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 12 inch 25 ton </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 11 inch </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th colspan=1 rowspan=1 > 10.4 inch 28 ton </th><td colspan=1 rowspan=1 > Polygroove </td><td colspan=1 rowspan=1 > 21 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 10 inch 18 ton Marks I & II </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th colspan=1 rowspan=1 > 10 inch 12 ton Marks III & IV </th><td colspan=1 rowspan=1 > Polygroove </td><td colspan=1 rowspan=1 > 32 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 9 inch Marks I-V </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th colspan=1 rowspan=1 > 9 inch Mark VI LS </th><td colspan=1 rowspan=1 > Polygroove </td><td colspan=1 rowspan=1 > 27 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 8 inch 9 ton gun </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th colspan=1 rowspan=1 > 8 inch 70 cwt howitzer </th><td colspan=1 rowspan=1 > Polygroove </td><td colspan=1 rowspan=1 > 24 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 8 inch 46 cwt howitzer </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 > Y </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 7 inch 7 ton </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 7 inch 6.5 ton </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 7 inch 90 cwt </th><td class="highlighted"  colspan=1 rowspan=1 > Woolwich </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > Y </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
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.