GE's Whatman parchment weigh boats designed specifically for Kjeldahl analysis so you can collect, transfer and drop both sample and weighing boat into the acid solution - speeding up your test without influencing the results of your analysis.
The boats are approximately 0.07mm thick and come in packs of 100.
Each boat is 55mmx10mmx10mm (2.17x0.39x0.39 inches)