55-5020 - Speaker Sub Miniature PCB
The 41.T70P015HLF is a micro speaker.
Mfr Name: IMO Precision Controls
Mfr Number: 41.T70P015HLF
See all items in 0''~4 1/2'' Full Range Speakers
55-5015 - Speaker Sub Miniature with Leads
41.T70L015HLF is a magnetic transducer with leads.
Mfr Number: 41.T70L015HLF
55-5045 - Speaker Mylar 0.15W 8 Ohm
The LS04436 is a miniature style speaker that uses a black Mylar cone.
Mfr Number: 41.MS36LS-LF
I have dealt with MCM Electronics a number of times and have been more than satisfied.