Calvert Polycarbon Premium Cello Case. 4/4 Size - Amazingly lightweight and easy to carry, durable and protective to transport your instrument, and spacious! The Calvert cases are constructed of protective and scratch-resistant Polycarbon with durable and long-lasting hardware. Cello case features include: two bow holders, backpack and top rolling strap, and wheels. (Does not include back music pocket) Cello Case weighs 9.0 lbs. Choose Color from drop down box below. Available in Black, Blue, Grey or Red.