All zill are made by Saroyan/ USA.
Manufactured in the USA since 1970.
All zils are sold in sets, consisting of 4 pcs of zils and one package elastic.
Unfortunately I do not get any answers or shipments from Saroyan. I have to stopp selling the Saroyan zills after almost 20 years. I am very sorry!
Update: At the moment Saroyan is not able to produce enough zills.