塗改液尾部的英文字意思是....?

塗改液尾部有一個突起的大寫英文字母?

1) it is model number of mould;容器的鑄模型號(I prefer this answer)

2) the plastic container is made of,塑膠F/G製的容器


plastic F, a vinyl plastic formulation, containing 35% copolymer D;
plastic G, a vinyl plastic formulation, containing 5 1% polymer B.
types of vinyl plastics

Mine is [D], but I do not know its meaning

I don't know!