I have used these jars every time I grow. They always work out great!!
Love these jars. Never had one contaminate and they always take. Perfect.
Quality substrate jars. Have purchased them befote and will again.
Love this company. Thanks. Jars are always great never have I ever contaminated one of them. No joke
Great jars colonate fast and have been sterile. I've used the product about 10 times.