Buy more get more free offer
For every 6 bottles of selected resins purchased (some items are excluded from the discount)), 1 of the 6 will be free (auto-discount at checkout)
For example, standard resin 2000g: $29.49/bottle, with this offer, you only need to pay $147.45 and get 6 bottles in total, you will get about $24.58/bottle (=$12.29/kg)