Products › Side Connectors Side Connectors $26.50 Type: 3" 4" - R1 4" - Thruflow 5" Quantity: Add To Cart Added! 40-5022 / Connector side 3"40-5023 / Connector side 4" / R-140-5108 / Connector side 4" / Thruflow40-5024 / Connector side 5"