Dental High Speed Handpiece Adapter Converter Stainless Steel 4 Holes to 2 Holes. The new high quality dental parts--- Handpiece Tubing Adapter. which is the important part of dental handpiece. It is often used in changing 2 hole Handpiece on a 4 hole Connector or else. It is convenient for dentists to transform 2-hole quick connector and 4-hole quick connector easily.
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