Model Number:0703051 / 0703031-003 Item Type:Ear Care Material:PVC Item Name:Hearing aid earmold bent tubing Color:Transparent Size:3.1 mm OD / 3.0 mm OD RM2747583351041713 6PCS Hearing Aid Earmold Bent Tubing Prebent Tube Earmolds need to be re-tubed regularly. It is surprising how much the tubing can affect the sound quality. Choose from 3.1 mm OD and 3.0 mm OD How To Re-Tube An Earmold Supplies : * Reamer tool, * Cement (acrylic for hard molds, silicone for soft molds), * Preformed tubing, * Tube puller, * Scissors, * Alcohol pad or disinfectant wipe. * You may need a tube expander to stretch the tube when reattaching it to the hearing aid. If you are uncertain whether you need a tube expander, please contact the earmold lab or your hearing aid manufacturer before removing the old tubing. 1, Run the earmold under hot water. 2, Remove old tubing with a smooth, gentle motion. Do not pull hard or tug, as excessive force could rip the tubing. 3, Remove any tubing bits from inside the hole, using a tubing reamer. 4, Apply cement inside the hole of the earmold. 5, Thread tube puller through the hole. Place the tip of the quilled end of the tube through the loop. 6, Pull firmly until the tubing is through the earmold. Then position for comfort. 7, Carefully cut the tube as close to the earmold as possible. 8, Wipe earmold with a disinfectant cloth, and reattach to hearing aid.