13.5mm price shows cost for 10 pc ($3 each); sold in 10pc packs- list number of 10pce packs you need. THIS ITEM IS NOT IN STOCK- AVAILABLE TO BULK PRE-ORDER . COST WILL BE LESS THAN NORMAL WHOLESALE AND DEPENDANT ON SILVER RATES AT THE TIME WE ORDER FOR YOU. TO TAKE ADVANTAGE OF THIS BULK PRE-ORDER OFFER, YOU MUST SELECT A MINIMUM OF $50-$100 IN EACH DESIGN- (this depends on the size and cost of the item & will be confirmed with you when you place your order) & THEN THE DISCOUNT WILL BE APPLIED. NO ORDERS WILL BE placed for you UNTIL WE HAVE CONTACTED YOU DIRECTLY ABOUT YOUR INDIVIUAL BULK PRE-ORDER...THANKS