New Valve Seat Grinding Stones Set Of 48 Pcs For Sioux Holder 11/16  Thread USA Product Specification: Grinding Wheels Set 48 Pcs :- VITRIFIED BOND 80 GRIT MEDIUM.  ALUMINIUM OXIDE PINK STONES 25MM (1") TO 38MM (1.1/2")  STONE SIZES :-  2.1/2" - 4 PCS,  2.3/8" - 4 PCS  2.1/4" - 4PCS,  2" - 4 PCS ,  1.7/8" - 4 PCS,  1.3/4" - 4 PCS,  1.5/8" - 4 PCS,  1.1/2" - 4 PCS,  1.3/8" - 4 PCS,  1.1/4" - 4 PCS,  1.1/8" - 4 PCS  1" - 4 PCS  STONE THREAD - 11/16"  FREE  TARIFF AND FREE DUTY FOR USA CUSTUMERS / BUYERS