L1977-1

Center : 21 x 28

Diamond : 

3.8mm x 2

3.3mm x 4

2.8mm x 22

L1977-2

Center : 19.5 x 26

Diamond : 

3.8mm x 2

3.3mm x 4

2.8mm x 20

L1977-4

Center : 16.5 x 23

Diamond : 

3.8mm x 2

3.3mm x 4

2.8mm x 16