Type Blower Color Multicolor Item Weight 9 lb Upgraded ELI? E blowers are now available!! Rather than using the standard tangential squirrel cage blower, you can now upgrade your 600-1 kit with more heat efficient centrifugal blowers. These blowers eliminate a common failure point on the original 600-1 blowers, which is the outside bearing behind the rubber end cap. High temperature grease and properly set and pinned metal wheels. Besides their high temperature application, the benefit of centrifugal blowers over their tangential counterparts is that they’re also more quiet. We’ve? B tested these at nearly 6dB quieter for each blower.