Listing is for 10 caps. We sell single caps in other listings. Standard 55, 30,16 gallon steel drum plug. 2 " NPT I believe?? Measures 2-1/4" across the threads.Off steel barrels that had fragrance oil. We have smaller 3/4" NPT too if you need them contact us. Could come in any color. They are used and may have some small amounts of residual oil dust dirt odor etc.If you need more than 2 we can work out a better price; Message us. PLEASE LOOK AT PICTURES FOR DETAILS AND CONDITION. ASK ALL QUESTIONS PRIOR TO BIDDING OR BUYING. Everything we list is from our own stock. One owner, dry, smoke pet free; well cared for. Check our related items. We have many items and will combine shipping. If you need something you don't see, please contact us with your needs. We ship FAST and reasonably.All sales final, no returns. Payment must be received in 24 HOURS. PLEASE Leave Positive feedback and we'll do the same IMMEDIATELY AFTER RECEIVING FEEDBACK. PLEASE CONTACT US IF THERE'S A PROBLEM, WE WILL RESOLVE ISSUES. USA shipping to a confirmed address Only. ZERO FEEDBACK BIDDERS MUST CONTACT US OR THE BID WILL BE CANCELED. MOST ITEMS ARE FOR SALE LOCALLY AND WE RESERVE THE RIGHT TO END AUCTIONS WITH NO BIDS. PLEASE GET YOUR BID IN EARLY. Thanks for looking! Check all our shipping options for the least expensive method. Feel free to make an offer. The worst that can happen is a counter offer! Add to cart for shipping quote on multiple quantities . These are used and will have some dust, dirt, residue or original contents oil on them. All are in good working condition! All items are cleaned with disinfecting wipes where applicable. All items are handled and packed by 1 Covid free person. Any part numbers listed or models they fit our for reference only not guarenteed. Please do your own homework and look carefully at the pictures. Ask questions before buying please.