Waterproof refractometer

Dear friend,
See the picture and price below, which type and how many pcs do you need?
1. new design common type: this model has the water proof function.
usd15.5/pcs, MOQ=100pcs
usd14/pcs, MOQ=300pcs
usd13/pcs, MOQ=500pcs
2. new design light type: this model has the water proof function, you can change the batteries by yourselves, and the light can last bright when you press the button, and auto power off after 1 minute.
usd19/pcs, MOQ=100pcs
usd18/pcs, MOQ=300pcs
usd17/pcs, MOQ=500pcs
3. common refractometer common type: have black, red, blue and green 4 colors for choose.
usd10/pcs, MOQ=100pcs
usd9/pcs, MOQ=300pcs
usd8/pcs, MOQ=500pcs
4. common refractometer light type: you can change the batteries by yourselves, and the light can last bright when you press the button.
usd13/pcs, MOQ=100pcs
usd12/pcs, MOQ=300pcs
usd11/pcs, MOQ=500pcs
Waiting for your idea, thanks.
Nice day.
Regards,
Nancy
sales@huixiasupply.com