FRP fan stack is made by two method, hand lay-up and and SMC. You could choose these two different producing method based on your requirement. For these two methods, the final effect is the same. The hand lay-up method is glue the water-resistance resin with the high quality fiberglass reinforcement by hand. So it is durable. For the SMC method, the FRP fan stack is produced by mould. The production time is shorter than hand lay-up. And the price is lower too.
