Unbreakable and tear-proof, DuraTuff™ Foam “Tube” Bowling Pins are firm, yet soft, and won’t bang up walls, floors, nearby furniture, or kids! A 4″ diameter tubular shape makes them stable, even on carpets, and they’re the only “stackable” pin, which allows them to be used as tall, vertical run-through obstacles or throwing knock-down targets. Tube Pins are sold in sets of 10, with four 6″ dia. saucers. Tube Pins can be wrapped with standard floor tape for color-coding or contrast.