Overview Reviews Product Description 10 hole. 20 brass reeds. Plastic frame. Engraved stainless steel plated cover. Key of Bb Product Videos Custom Field Product Reviews Write a Review Write a Review × Bryden Bryden M70BBDiatonic ÒBluesÓ harmonica. Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *