GB Part No. ST303-R6N
Fits:
Stihl - 009, 009Q, 010, 010AVEQ, 010AVQ, 110AV, 011AVEQ

GB Part No. ST306-R6N
Fits:
Stihl - 012

GB Part No. ST304-R6N
Fits:
Stihl - 015, 015AV, 105EL

GB Part No. ST305-R6N
Fits:
Stihl - 017, 018, 019, 019T, 021, 023, 025, MS210, MS250, MS230, MS192, MS191, MS211, MS170, MS180, MS190, 192 CE

GB Part No. ST307-R6N
Fits:
Stihl - 020, 020AV, MS200