Our Plastic Impression Perforated Trays are disposable. The keyway perforations and sidewall slots ensures enough retention. The posterior rim lock feature minimizes secondary flow or gagging. The finger rest is for easy removal and the smooth edges provide patient comfort. The rigid design captures the best impression without distortion. Available in Blue, 12/bag, 10 bag/box. Comes in 9 sizes (#1-#9) for easy patient anatomy matching.