This tee is used to provide a tee intersection with standard 300mm straight ducting. It requires a slotless joiner (Part No: TC1279-287A) at each interface, which provides a smooth & strong joint. Joiners, available separately. 

• Includes cover (Part No: TC1279-280) 
• Clips straight into slotless joiner (Part No: TC1279-287A); available separately 
• Ribs included for extra strength 
• Tough, fire retardant material 
• Also available without cover; as Part No: TC 1279-279 
• Purchase by the unit