MS180 crankshaft oil seals, there are 2 types. How do you know which ones to choose?

We have 2 different sorts for the MS180, Therefore it will depend on what one is on your chainsaw. We do have pictures on both of the below link. If you have the Full black plastic one you would need the below. 9639 003 1585 - Oil seal 15x25x5 - £4.51 + VAT & Delivery, In stock on the below link: https://www.lsengineers.co.uk/catalog/product/view/id/10418 If yours is green (Sponge like) you will need the below. 9638 003 1581 - Oil seal 15x25x5 - £9.01 + VAT & Delivery, In stock on the below link: https://www.lsengineers.co.uk/catalog/product/view/id/10109