Our cello and bass “Saddle Rider Endpin Mount” (cello model shown above) MSRP as follows: 10 mm Cello Endpin Mount Assembly $120. Add $40 for an optional carbon fiber endpin, $50 for a steel endpin, or $70 for a titanium endpin. Mount includes a Kevlar tailgut. Double Bass Mount: MSRP: $140, optional endpin prices for double bass are the same as the cello prices listed above. The standard cello mount is 25.75 mm at the base of the plug, standard bass mount is 31 mm. Custom sizes are available upon request.