Mfg#	Height	Inside Dia.	Width
ZNC X1	2-1⁄8"	3⁄4"	2-1⁄8"
ZNC X2	2-1⁄8"	7⁄8"	2-1⁄8"
ZNC X3	2-1⁄8"	1"	2-1⁄8"
ZNC X4	2-1⁄8"	1-1⁄8"	2-1⁄8"
ZNC X5	2-5⁄16"	1-1⁄4"	2-5⁄16"
ZNC X5A	2-1⁄2"	1-1⁄4"	2-1/2"
ZNC X6	2-1⁄2"	1-3⁄8"	2-1/2"
ZNC X7	2-1⁄2"	1-1⁄2"	2-1/2"
ZNC X8	2-7⁄8"	1-3⁄4"	3-1⁄4"
ZNC X9	2-7⁄8"	2"	3-1⁄4"
ZNC X10	3-3⁄4"	2-1⁄4"	4-1⁄4"
ZNC X11	3-3⁄4"	2-1⁄2"	4-1⁄4"
ZNC X12	3-5⁄8"	2-3⁄4"	4-3⁄4"
ZNC X13	3-5⁄8"	3"	4-3⁄4"
ZNC X25MM	2-1⁄8"	25mm	2-1⁄8"
ZNC X30MM	2-3⁄8"	30mm	2-5⁄16"
ZNC X35MM	2-1⁄"	35mm	2-5⁄8"
ZNC X40MM	2-7⁄8"	40mm	3-1⁄4"
ZNC X50MM	2-7⁄8"	50mm	3-1⁄4"