The 90 micron size can be used for flower or finer material.
Rosin Evolution bags known for their quality & features:
Dimensions: 7,62 x 15,24 cm (3x6" inches)
Rosin Evolution bags are designed to withstand heat and pressure.Each bag will hold 30-40 gr. and is turned inside out for maximum yield.For best results, aim for 1000-1500psi and limit each bag to 40g of material.