I bought new, but never used. Use of this item is intended for certified divers with the expertise needed to use this technical piece of equipment. Honed by extensive testing and refinement, the Katana, designed by Nick Hollis in partnership with leading cave diving instructors, is a cutting edge cave penetration tool without equal. The SMS Katana design builds on the proven SMS100 and SMS75 sidemount systems but was specifically developed for optimal performance in the warm water cenotes and caves of northern Florida and Mexico. The perfect wing size and weight for travel. One size fits all harness. Integrated Weight system with 3 weight pockets: two 5 lb. (2.26 kg) and one 3 lb. The item "Hollis Sidemount Systems (SMS) KATANA" is in sale since Tuesday, July 9, 2019. This item is in the category "Sporting Goods\Water Sports\SCUBA & Snorkeling\Buoyancy Compensators". The seller is "lil_lucky6363" and is located in Pinson, Alabama.