These blades come hubless and require a hub kit.. either a 1/2" hub or 5/8" hub. When ordering any blade other than a 2-Blade, you will need this kit. When ordering, go to accessories for these items Lau 60556201 3-Blade Fan 27d CCW 18" $33.30 Lau 60556101 3-Blade Fan 27d Pitch CW 18" $33.30 Lau 60556601 3-Blade 33d Pitch CCW 18" $33.30 Lau 60556501 3-Blade Fan 33d Pitch CW 18" $33.30 Lau 60556801 3-Blade Fan 27d Pitch CCW 20" $37.08 Lau 60556701 3-Blade Fan 27d Pitch CW 20" $37.08 Lau 60557401 3-Blade Fan 27d Pitch CCW 22" $45.20 Lau 60557301 3-Blade Fan 27d Pitch CW 22" $45.20 Lau 60557601 3-Blade Fan 33d Pitch CCW 22" $45.20 Lau 60557501 3-Blade 33d Pitch CW 22" $45.20 Lau 60557801 3-Blade Fan 27d Pitch CCW 24" $34.24 Lau 60557701 3-Blade Fan 27d Pitch CW 24" $48.20 Lau 60558001 3-Blade Fan 33d Pitch CCW 24" $48.20 Lau 60557901 3-Blade Fan 33d Pitch CW 24" $48.20 Lau 60717101 3-Blade 23d Pitch CW 16" $31.21 Lau 60717201 3-Blade Fan 23d Pitch CW 16" $31.21 Let us help you through the selection process. Value ac is a proud distributor of Hart and cooley registers, air diffusers, vent covers, and air conditioning vents. We can special order anything you need. Please call us at 1-888-242-7725 Toll Free for a quote. We want to earn your trust! Floor Registers and Vent Covers Blog