Features
1）A1 model: for 600RT （Canon 600RT， YN-600-RT， Mk-910，ect.? Silicon product is flexible， so sometimes it fit serval model at same time.
2）580EX
3）430Ex
4）SB800/600

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Below is universal type

5） A2 model， suitable for:

6）A3 Model suitable for：SB900、SB910 MK-910

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7）A4 model for: -L type

8）A5-M type: for Canon420./430Ex，? Nikon SB600 SB800，ect.