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:
Printrbot
Table title:
Discontinued models
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Model </th><th colspan=1 rowspan=1 > Image </th><th colspan=1 rowspan=1 > Years available </th><th colspan=1 rowspan=1 > Build volume(inch) </th><th colspan=1 rowspan=1 > Filament </th><th colspan=1 rowspan=1 > Comments </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Printrbot Simple Metal </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 2014–present </td><td colspan=1 rowspan=1 > 6×6×6 </td><td class="highlighted"  colspan=1 rowspan=1 > 1.75 mm PLA (Heated build platform for ABS use available) </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Printrbot Simple 2014 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 4×4×4 </td><td class="highlighted"  colspan=1 rowspan=1 > 1.75 mm PLA only </td><td colspan=1 rowspan=1 > Largest model available </td></tr>
<tr> <td colspan=1 rowspan=1 > Printrbot Jr. </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 6×6×6 </td><td colspan=1 rowspan=1 > PLA only </td><td colspan=1 rowspan=1 > Can be folded for storage. </td></tr>
<tr> <td colspan=1 rowspan=1 > Printrbot LC </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 6×6×6 </td><td colspan=1 rowspan=1 > ABS+PLA </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Printrbot GO </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2013 </td><td colspan=1 rowspan=1 > 8×7×6 </td><td colspan=1 rowspan=1 > PLA+ABS </td><td colspan=1 rowspan=1 > Suitcase form factor, designed in collaboration with Ben Heck </td></tr>
<tr> <td colspan=1 rowspan=1 > Printrbot (original) </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 6×6×6 </td><td colspan=1 rowspan=1 > ABS </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
How much filament diameter can Printrbot Simple models accept?
Answer:
Printrbot models can be outfitted to accept 1.75 mm diameter filament.