Round ceiling extension collar for 3" Apollo housings. Threaded collar replaces the existing collar installed on housing. Can be used with ceilings 0.875" to 1.25" thick
Compatible Housings: NHAP-3R: 3" Apollo Round Non-IC Housing with Field Changeable Optics NHAPIC-3R: 3" Apollo Round IC Housing with Field Changeable Optics NHAPNIC-3R: 3" Apollo Round IC Housing with Fixed Spot Optics