6731
The results show that 3-D printed plastics are potential materials for bespoke chemically resistant labware at less than 10 % of the cost of such purchased tools .
 3-D, plastics, materials, tools
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 3-D, plastics, materials, tools