Dellorto mixture screw VHB29, VHB30, VHBZ, PHBH, PHF30, and PHF36 carbs on Guzzis. The metering tip on these mixture screws is ~2.25mm long. Overall length is 33mm.
Dellorto number 7449 suitable for PHBH, PHBL, PHF, PHM, VHB, VHBZ, VHBT carbs as used on Ducati and other brand bikes and scooters. Ducati part numbers 061527449 and 800012033