TEC Tee Nuts Double Undercut EN24T GF21 set of 3
Used but plenty of life left in them yet see pictures to see wear
Bolt size M12 x 1.75
T2=20.5mm
T3=18.9mm
T4=13.4mm
T5=23mm
T6=10mm
T7=7.5mm
T10=5.5mm
T11=17mm