Umuyoboro wo gushyushya umuyoboro wamazi ukorwa kuri reberi ya silicone, kandi ibara ryumukandara dufite umutuku, ubururu nicyatsi. Ubugari bwumukandara burashobora gukorwa 14mm, 20mm, 25mm na 30mm, uburebure bwumukandara burashobora gutegekwa 2ft, 3ft, 4ft, 5ft, 6ft, n'ibindi.