You will want to make sure to keep a supply of blunt needle sizes on hand when you use multiple sizes. You can create your own unique lab kits, to include an assortment of the sizes you require. In order to start building your own custom kit, you should order each individual size you need in large enough quantities. When you start running low on a particular size, you can reorder just that size.
Make Sure to Properly Store a Blunt Needle to Keep It Clean
How you store a blunt needle is important, in order to keep it clean. In manufacturing industries, you should keep needles in containers, so that dust and dirt cannot get on them or into the openings. In healthcare industries, you will want to take further care in storage, in order to ensure that the needles are kept clean. This could include sealing individual needles into protective packaging and removing them with protective rubber gloves.