Quick question about IGF application

The last thing I have to order is sticks and I'm not sure how many to order. I will be doing 40mcg a day and want to apply bilaterally. How many needles does this require per day? Withdraw (1), apply to left side (2), apply to right side (3)? Or can I use the same one for withdrawal and application to both sides?

Need to order today so a quick answer would be greatly appreciated.

YGPM bruda