Soluble NPK fertilizer 14-10-8 special for rubber tree color: Grey form: granular NPK 14-10-8special for rubber treeColor: Greywe can supply NPK fertilziers with various specification, such as 10-10-10, 15-15-15, 14-10-8, 16-16-8+TE, etc. Soluble NPK 14-10-8