The classic design of an insulin syringe, the needle is a 29 gauge 12.7mm syringe needle that has been trusted by diabetics for many years. You can buy needles and syringes at the best prices in the UK.
The material of the lens mask is made of plastic PP non-woven cloth. Generally, filter paper is added between the three layers of the mask to improve the filtering effect of the non-woven mask.