Toho Seed Bead Cube 4mm Opaque Jet. Seed Bead Toho Cube 4mm opaque Jet , in a bag containing approximately 10 grams. Origin Japan. Here at Jillybeads we understand that some beaders can be a bit reluctant to buy online so if that is you, give us a call as we are always more than willing to take your order over the phone, or even add an addition onto your existing order. We like to make your shopping experience as simple and easy as possible!