Triumph Seat Diaphragm TR4 -TR6 OEM# 612251 GSKT05 New Triumph seat diaphragm supplied with metal fitting hooks. 10 Hooks are required for this diaphragm and are supplied with the diaphragm This is used like a big sprung net that allows some support and spring for your lower seat when the seat is sat on, making the seat comfortable. If you or or your passenger are having to use an extra cushion for support... here's your solution! High quality aftermarket reproduction part To suit vehicles Triumph Triumph TR4 from CT20877 Triumph TR4a Triumph TR250 Triumph TR5 Triumph TR6 Alternate part numbers: 612251