The grids we often use and their links on EMS.

Hole Shape Hole Size Period Grid Type Pack Price ($) 200 Mesh 300 Mesh 400 Mesh
R 1.2/1.3 ~1.2µ 1.3µ Copper 100/pk 700 Link Link Link
R 1.2/1.3 ~1.2µ 1.3µ Gold 100/pk 825 Link Link Link
R 1.2/1.3 1.2µ 2.5µ Copper 100/pk 718 Link Link Link
R 1.2/1.3 1.2µ 2.5µ Gold 100/pk 825 Link Link Link
R 2/2 2µ 4µ Copper 100/pk 700 Link Link Link
R 2/2 2µ 4µ Gold 100/pk 812 Link Link Link

 

EMS Catalog Number Formula
Quantifoil Mesh Size (x100) Pack Size Grid Type Space
Q 2 25 CR 1.3
3 50 AR 2
4 100 2.5

 

Quantifoil R1.2/1.3 Micromachined Holey Carbon Grids, 200 Mesh Gold,Pack of 100,SPI Slide-A-Grid Box
Size 200 - 300 - 400 Mesh, Pack of 25 - 50 - 100
Item 4220G-XA (or change "XA" for other types)