11 mm Acrylic Acid Yellow Tri-Beads 1,000 Pieces. We carry a huge selection of Tri-beads of over 30 colors at bulk wholesale pricing. Tri-beads are made from plastic which makes them an affordable craft for jewelry projects including ornaments, keychains and bracelets. Around Christmas time many people use tri-beads to make Tree Ornaments so we sell tons of tri beads in red, green, white. Tri Beads are also known as propeller beads or cartwheel beads.