I can just recommend them.
After 20 draw outs the rubber is just trash. With the spike you put it in and put the syringe on the spike to draw out. Not even a need for a needle
Every time you puncture the stopper it becomes more permeable and it has a greater chance of introducing pyrogens or even live microorganisms into the vial which causes the immune system to react, giving you PIP
I use spikes cause I use 5 vials. Some are pierced 50 times cause ment I only use 0.2, test and bolde 0.25 cause its 600mg.
If you finish it with 10-15 injects its okay. But if you draw 20+ times the rubber will get destroyed sooner or later
It depends on the needle size and where you hit the rubber. Try to hit the outer ring, instead of the straight middle.
I have a 100ml Vial, I stabbed like 100 times with 30g needles and its still good.
If you harpoon it with 21g, you won’t get 100 stabs
With 30g you cant draw 600eq or 600 test. You need 23g at least. 30g would get nothing out.
And even if I do the outer with 50 times it will be fked. 1 Euro for a spike is worth it for me. Much easier