****** - Verified Buyer
4.5
What can I say. It is a great consumable.I might add, we quit replacing these springs so often when we started running our needle scalers on a regulator. We had been running them on unregulated shop air (150psi). We added a small $4 regulator at the inlet to the needle scaler, set the regulator to 85-90 psi and just like magic we quit going through the springs.