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This add-on is to further customize a single density sleeve. Single density sleeves are made in our medium silicone. A dual density sleeve makes the head of the sleeve in soft and the shaft of the sleeve in medium.
You will need to purchase one add-on for each sleeve you would like to alter.
If you want to further customize the preset silicone firmness mention above on a dual density sleeve you will also need to purchase ethe "Shore Change" Add-on.
Adding durian stiffens silicone so if you are looking for the true shore feel of the silicone skip the durian.
Dual Density requires a minimum of 1.5 inches longer than internal length.
International Shipping Update 12/7/2022***
At this time (December 2022) the only valid international options are UPS Worldwide Expedited and UPS Worldwide Saver. Occasional glitches with the website may offer other invalid options, do not use these. We are not yet offering DHL, but may in the future. UPS has the best track record for delivery among three services we've tried. If there is an issue with shipping, you should contact the carrier before you contact us, as once it's with the carrier, there's very little we can do. We do not make any money off of shipping. If you have taxes or duties due for international orders, we cannot do anything to prevent your need to pay them.