This 96-well Rack was designed to help stabilize a 96-well plate for PCR on a flat surface. In case you want to cut your 96-well plate down and use fewer wells, the individual holes are sized perfectly to keep it steady. This rack was designed to work specifically with this 96-well plate but may work with others: https://www.usascientific.com/96-well-pcr-plate-semi-skirt/p/pcr-96-semi-std This design was modified by Sara Belko from an original design by an unknown designer for Dr. Marco Tigano.