40mm piston diameter
O/E:7021041110

OD 39.5mm x 1.2mm thick
O/E: 1123 034 3005 / 22182 41210

12.5mm OD

HK series, fits Mitsubishi, Stihl & more O/E:0018004

Air Filter Element O/E:KA40046AA

Late Echo

O/E:KS20037AA

Universal

48mm bore size
O/E: 503 93 90 73

OD 38mm x 1.5mm thick
O/E: 1130 030 2004

90°
Suits many Husky

*Clips onto a 12 volt battery