If you find the information useful you can donate at https://www.firstdensitymaterial.com/products/donate-to-new-research-and-development-projects-and-material-for-future-videos
All funds go to future videos / equipment cost / materials used in the videos
Link to ruler
https://drive.google.com/file/d/1-jkuQjZd_gGWs6dxhtb_PYMH2wACVpAa/view?usp=sharing
Hull Cell
https://www.aliexpress.com/item/Hull-Cells-267ml-Hull-Cell-Testing-Equipment-Harrington-groove-graduated-Hough-groove-sub-tank-without-heating/32651750237.html?spm=2114.search0104.3.16.4a3b176aCKuJvA&ws_ab_test=searchweb0_0,searchweb201602_1_10065_10068_10130_10890_10547_319_10546_317_10548_5730311_10545_10696_453_10084_454_10083_5729211_10618_10307_538_537_536_10059_10884_10887_100031_321_322_10103,searchweb201603_51,ppcSwitch_0&algo_expid=46bcd85b-8aeb-41ea-af48-60a7fe9ffb4c-2&algo_pvid=46bcd85b-8aeb-41ea-af48-60a7fe9ffb4c
