Sapphire glass beads.The Sapphire Falls combines a beaded design with a gradual curve to make G-spot stimulation easier. It's double ended, so you have the choice of a small first ball or large first ball, and with care it can be used anally as a probe or P-spot stimulator.
Being made of glass, the Sapphire Falls holds heat and cold well for temperature play. It's best if you heat or cool it in a bowl of water.
The smallest balls are slightly under one inch in diameter, the midsized balls are slightly under one and a quarter inches, and the large ball is one and a half inches across. Due to the reversible design almost the entire toy is insertable, but in practice the last ball didn't slide in when used anally, so the usable length is between four and three quarters and five and a half inches. When used vaginally the Sapphire Falls can be inserted as far as you find comfortable. The lack of a positive stop on the toy means that you do need to be careful if you're interested in using it anally, but the design made it impossible for me to fully insert the Sapphire Falls anally - there was always enough outside to grab.
A bit more length would have made it easier to hold while doing deeper thrusting. I never had it slide out of my hand, but grabbing on to the small ball (when it's used large-end-first) makes you wonder.
Since glass is nonporous and resistant to chemicals the Sapphire Falls can be easily and effectively sanitized, either by boiling or using 10% bleach water.
It's best to protect glass toys while they are being stored, since chips and cracks can create stress points that the toy can crack at. SSA includes a padded cloth drawstring bag that will keep your toy safe when it's in the toybox.