This is for 1 - MV Products Lenses LS 202 Headlight & Marker Lenses For Model Trains 1975 NOS (4 LENSES)

See pictures for back side of package. You will find directions or uses. 

Please see the pictures, they are part of the description.
Item may ship in a plastic bubble envelope.  I try to ship your item(s) out as fast as possible. So, If you're bidding on or considering another item and you want me to delay shipping, PLEASE make it CLEAR by sending me a message or noting it on your order (IN BOLD LETTERING). I can delay for up to 4 business days. If not, I cannot do anything about shipping costs.