We have lots of information on bone press flaccid stretched length, here at PEGym. Check out the following articles to help you understand this important measurement –

Measuring Stretched Flaccid Length (BPFSL)

BPFSL and BPEL, Pelvic Tightness, Adding Girth, & More: Ask the Experts

Penis Wiki of Enlargement Terms & Acronyms

 

 

 

http://thebiohacker.com/articles/bone-press-flaccid-stretched-length-understanding-your-bpfsl