CRF250F - Tuscany Racing Shock Reservoir Nipple Cover

I ordered a new rear shock for my CRF250F from Tuscany Racing out of Brazil. Message them on whatsapp and they'll ship to the US. These guys are awesome! https://www.tuscanyracingshop.com.br/amortecedor-tuscany-racing-honda-crf-230f-ou-250f

On the expansion reservoir, there is a small air valve/nipple. While I don't expect to ever have to service this part, I didn't like the idea of the valve getting contaminated with dust and dirt, so I threw this cover together. There's a metal cap over it already, but wanted to double up the protection.