small Barbed Elastic Loop to prevent the pen fall to the ground

Assemblies with balls; assemblies with knots; assemblies with clasps; decorative elastics with barbs, decorative cords with barb Assemblies with barbs:1) Natural cord with pointed barbs at each2) Twisted cord with barb one end and knot other end 3) Ribbon loop with barb 4) Twisted cord loop with barb5) Elastic loop with barb6) Flat elastic barbed each end7) Elastic barbed each end8) Twisted cord barbed each endAssemblies with balls:1) Elastic loop with ball2) Twisted cord loop with ball3) Elastic with ball each end4) Ribbon loop with ball5) Twisted cord with ball each end