An Aluminium Tegiwa Honda Vtec Solenoid Cover, Anodised in Red.
Reputedly for B series engines, but seemed slightly loose once fitted so decided to remove, hence mark and scratch as shown.
I don’t think they produced H series ones or even whether the solenoids are the same size etc.
Internal lower diameter is approx 26mm..
Please see pics to judge for yourself.
Happy bidding!