GU00823931055 Approximate width 6.3mm, slot depth 4.3mm. Sold in ~1 meter length. This "bulk" trim used on many models, for many different uses, 1997 onwards. Uses include decorative frame rail and steering neck covers, headlight mounts and starter solenoid covers.
Guzzi part number 00823931055 listed for uses on EV, EV Touring, Jackal, Bassa, California Special, Special Sport, Aluminum, Titanium, Metal, California Stone, Stone Touring, Vintage, Stelvio (not NTX), Bellagio, Nevada Classic 750 IE, V7 Classic, Cafe, V7 Racer, V7 Racer II, V7 Special, V7 Special II, V7 Stone, V7 Stone II, V7 Stornello II.