Glass ring 6 mm high (other heights on request)

Plastic ring with thread 6 mm high (other heights on request)

Glass ring 6 mm high (other heights on request)

Plastic ring with thread 6 mm high (other heights on request)

Glass ring 6 mm high (other heights on request)

Plastic ring with thread 6 mm high (other heights on request)

9 well macrolon quadrate 9 mm high

Glass ring 6 mm high (other heights on request)

Plastic ring with thread 6 mm high (other heights on request)

Glass ring 6 mm high (other heights on request)

Plastic ring with thread 6 mm high (other heights on request)

6-well round chamber macrolon ring 10 mm high