Bikkuriman Sleeves Collection Sleeves Available in separate listings, from 50 to 500 pieces. If you need more than that, please comment. For 48mm square cards, used for protecting collection seals. These are hard sleeves, not soft, so they provide even stronger protection against scratches to the cards. I've made various types, and this thickness is just right. If they're made thinner, they feel flimsy, and if they're thicker, the transparency is compromised, so I settled on this. Regarding refills, I've received many questions, so I'll explain. Search for "YSV-BDH81 pocket refill" on R. I use them too. There are two types: 20-pocket and 12-pocket. The 20-pocket is for 42mm square cards, and the 12-pocket is for 52mm square cards. (For single sleeves) The 20-pocket can hold 240 cards, and the 12-pocket can hold 144 cards. I use the 12-pocket for old Bikkuriman cards with double sleeves and Bikkuriman 2000 cards with single sleeves to standardize the refill size. I think the 12-pocket is suitable for old Bikkuriman cards as they look better arranged. There are various types of refills, some where the cards fall out easily when turned upside down, and some that are thin and flimsy, but the YSV-BDH81 refill is definitely a good choice. For those who want even stronger protection, I also sell 52mm square sleeves in a separate listing. You can put the 52mm square sleeves over the 48mm square sleeves. How about perfect protection with double sleeves? Made in Japan, but due to the machine specifications, there may be some dimensional errors, so please understand. Shipping: Mercari shipping, simple packaging. Target Products: Old Bikkuriman Kimetsu no Yaiba Man Bikkuriman One Piece Man Mobile Suit Gundam Man Bokura no Bikkuriman Gumla Twist Dokidoki Gakuen Harima Oh no Densetsu Time Slip Battle AKBkkuriman Tenshi Darake no Bikkuriman Akuma Darake no Bikkuriman Dragon Ball Man Pokemon Wafer Sumie Bikkuriman Jujutsu Kaisen Man 48mm square seals Thank you very much m(__)m