BIOSTAR S in excellent condition, used to make ortho retainers, can be used for splints, bleach trays, etc.. hook up to your compressed air supply and go. Posted By: JDL1985 78666, Texas, US 5/9/2026 You must be logged in order to contact the ad poster. Considering the real-time nature and volume of traffic on this website, Orthotown.com cannot review ads or confirm the validity of information posted. Buyer Beware and due diligence is recommended before purchases are made from any Classified ad.