Check the listing for details. OTO BLOCKS Large Foam Stops MADE IN USA Hearing Aid Ear Impression Pack of 50ea.. Condition: New. Listed at 8.95 USD. NEW (In-Stock) Fast Ship Larger Qty Offers are welcome While supplies last! Made in the USA (Listing is for 1) OTO BLOCKS Large Blue Foam Stops MADE IN USA Hearing Aid Ear Impression (Pack of 50ea.) (NOTE:) These are New old stock and they are believed to be manufactured by Westone P/n 20314 but the inserted labeling only states Made in USA. Approximately 13mm diameter x 9mm thick foam with 86mm long string. · These are NOT earplugs and provide No Hearing protection, these are Foam stops that are inserted into the ear canal when making ear impressions for custom hearing aids. Please see all pictures including the picture showing the included “Important Notice” from the manufacturer. This will be carefully packaged to arrive safely. Most orders are shipped the same day if received by 3pm EST Monday-Friday, otherwise the next business day. Thank you and have a great day! Warehouse Loc: D4A1