These foam rocks look like a chunk of asphalt but they weigh only +- 60 g (size: +- 20X10X12 cm).
They’ve very light, perfect for thread work.
Tips: Push a long needle through the foam rock and tie a knot around a piece of toothpick stainted in black.
You recive one piece! Threads and wax are sold seperately.
Can be use also like a joke when launched in public.