PAIR OF STERLING SILVER CORES / INSERTS FOR LARGE HOLE CHARM BEADS WITH 925 STAMPED ON THE FRONT Hole size (diameter): 5 mm. Total diameter, including outer rim, measures 7 mm. The insert is 2.5 mm deep - this is the part that sits inside the hole of the bead. Note that you will receive two cores, which are good for making one bead. Glue the inserts into each side of the hole of European style charm beads. Sterling silver, stamped 925. DESIGN TIPS The ideal glue to use with these cores / inserts is G-S Hypo Cement which comes with a precision applicator. POSTAGE I offer postage discounts for multiple purchases when items are paid for in a single transaction. Discounts are calculated automatically by eBay. Please note that if you want to buy more than one item, do not select the buy now option, simply put the items you want in the basket and pay when you are finished. UK customers pay £2.35 for Royal Mail 1st Class service (on items that are not offered with Free Delivery). Royal Mail Signed For service costs £4.20. There is a charge of 6p for each additional item after the first item.