Same as CK-648P only with ``Duracote`` Matte Satin finish chestpiece, color coordinated retaining ring and ``Ulfraflex`` binaural and tubing assembly.

Same as CK-648P except for the gold plated chestpiece and binaural.

A chrome plated zinc alloy single side chestpiece that features identical patented multi-frequency ``Ring-O-Raised`` fiaphragm system with matching ``Ultraflex`` chrome plated binaural tubing assembl

Newborn type that features chrome plated dual head chestpiece, ``Simplex`` binaural with 1 piece molded PVC tubing, metal retaining ring and color coordinated non chill ring.

Newborn type that features chrome plated dual head chestpiece, ``Simplex`` binaural with 1 piece molded PVC tubing, metal retaining ring and color coordinated non chill ring.

Features chrome plated single head chestpiece with metal retaining ring, ``Simplex`` binaural with 1 piece molded PVC tubing.

Features chrome plated single head chestpiece with metal retaining ring, ``Simplex`` binaural with 1 piece molded PVC tubing.

Same features as CK-601P only in ``Duracote`` solid black finish.

Features chrome plated ``Trimflex`` binaural tubing assembly, zinc alloy adult dual-head chestpiece with color coordinated non chinn ring and metal retaining ring.