Identical feature as CK-648P only with Woodgrain color coordinated finish chestpiece and ``Ultraflex`` binaural tubing assembly.

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

Same feature as CK-648P only with ``Duracote`` solid color coordinated chestpiece, retaining ring and ``Ultraflex`` binaural tubing assembly.

Identical feature as CK-648P only with Woodgrain color coordinated finish chestpiece and ``Ultraflex`` binaural tubing assembly.

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