Rimba Bondage Play Shibari ring. This silver-colored bondage ring is an accessory that is used with Shibari, the Japanese rope knot art. This ring is used as a central point to tie bondage ropes. The Triple Shibari Ring is made of non-magnetic stainless steel and is sturdy enough to withstand a lot of weight. The diameter of the ring is 23.5 cm and is 1.5 cm thick.