King & Queen of Rings

Work Bank:

safety goggles
first aid kit
tongs
fire extinguisher
meter stick
spring scale
micrometer
triple beam balance
equal arm balance
voltmeter
stopwatch
thermometer
graduated cylinder
apron
beaker flask
vernier
Ring Stand
funnel
test tube
test tube holder
test tube rack
watch glass
bunsen burner
ring for ring stand
ring stand clamp

The directions are: Choose the best laboratory tool from the word bank for the task listed below.

__________
__________ Two instruments to measure the diameter or thickness of a material

Please Fill in the 2 blank and the first one right i will choose you as the best answer.

Thanks so much.