Check the listing for details. Wire Reinforcing Bars For Orthodontic Style Plastic Retainers, Pro Use Only. Color: Clear, Condition: New. Listed at 59.95 USD. Includes 5 plastic sheets, 5 wire reinforcing bars, and 5 retainer cases. Does not include finished orthodontic retainer. Orthodontic style plastic material, .040 thickness, 5" squares, 5 pack. Made in the USA. The ideal choice for cosmetic orthodontic retention and patient compliance. Composed of FDA compliant PETG (Polyethylene Terepthalate Glycol). The .040" thickness is ideal for wear resistance and longevity. Thinner materials tend to crack more readily. Thicker materials tend to create an open bite. Acrylic will bond to this material. Instructions: 1) Trim the models in a horseshoe such that the palatal or lingual area is open. 2) Heat the plastic until the center droops to the lower clamping frame 3) Don't allow the plastic to droop any further. 4 ) Make sure the plastic fully adapts to the model. 5) Wait until the plastic fully cools before removing. Note: Retainers, models, pliers, and vacuum forming machine are not included. Store material in a dry place. PETG is hygroscopic (tending to absorb moisture form the air). The solution is simple. Heat the material in a standard oven at LOW temperature. Wire Reinforcing Bars For Orthodontic Style Retainers, 5 Pack. We designed these wires to make invisible aligners and retainers more stable and retentive. Made in the USA from 304V stainless steel, spring temper, 0.045" diameter round. Key Features Include: 1) Move teeth more effectively and efficiently. 2) Can be used on maxillary or mandibular aligners. 3) Make minor adjustments to posterior arch widths. 4) Oversize shape allows modifications to fit most patients. 5) Packaged in a set of 5. See the photo section for illustrated and written instructions. Retainer Cases, white, 5 Pack Note: Retainers, models, instrument, and pliers are not included. FREE WORLD-WIDE SHIPPING. Manufacturer direct. We have additional orthodontic plastic and lab services available. Graham Tool Co., Inc.