DescriptionBrand Name : DJC ComponentsOrigin : Mainland ChinaMaterial : Aluminum AlloyCategory : Chain WheelFovno Deckas Chainring adapter for sram GXP spider to 104BCD 110BCD for Shimano Direct Mount converter M6100 M7100 M8100 M9100Fovno is a high end brand of Deckas. Nice quality and design. You will like it.Surface treatment looks good compatible to Deckas brand. A same family products.Model 1GXP to 104BCD adapter, 4armsWeight:39gOffset: 6mmConvert for Sram GXP to BCD104, X9 XX1 X0 X01 GXP, single speed, 1xModel 2GXP to 110BCD adapter, 5 arms, for 1x and 2xWeight: 53gOffset: 0mmMaterial: Aluminum 7075-T6, anodizedConvert for road bike gravel 110BCD chainringModel 3Shimano Direct Mount to 104BCDWeigh: 39gOffset: 4.5mm(same to shimano standard)Convert for M6100 M7100 M8100 M9100GXP to 104BCD ovalGXP to 110BCD roundfor Shimano Direct mount to 104BCDlike M6100 M7100 M8100 M9100